Learn in your language
Skip to content
Pearson Edexcel International GCSE Mathematics B (4MB1) · single Higher tier · Pearson Edexcel ·

Identify all lines of symmetry in complete figures

Test and draw every mirror line of a complete given figure, including oblique axes, no-axis examples, concavity and true decoration.

Pearson 4MB1 · Complete symmetry · Single Higher tier · Mathematics B 6E
Exam scope and assessment notes

Six original teaching and explained-practice strands jointly address6E:line and rotation recognition,comparison,point and plane symmetry,and supplied-axis/order completion. All24fixed stage cases retain complete boundaries,physical disk categories,actual constructions and independently recorded final conclusions. Unknown corners stay masked until entered;selected counterexample cards and inactive work remain explicit. Identity is counted once;order1does not establish a unique centre. Numeric1e−7recognition matches and exact rational point/plane/completion helpers support fixed examples,not arbitrary proofs. Plane normals are software only,not additional exam prerequisites. Written exhaustiveness,minimum-angle,infinite-family and geometric reasons need human review. No marks,mastery,instrument competence,specialist signoff or formal assessment readiness inferred. Only single Higher-tier linear4MB1 in November2026/June2027entry contexts;no MathematicsA,Foundation,modular,other qualification or unsupported-year completion inherited. BookISBN9780435044107remains metadata only;full book bodies,chapter/Hub alignment and fresh browser,touch/account/saved-progress checks remain unverified.

Before you begin

  • Read polygon boundaries, equal-side marks and right-angle marks.
  • Distinguish a complete straight line from a ray or boundary segment.
  • Use tracing or folding as an instructed check without treating an unscaled sketch as exact measurement.

Work on paper. Try each question before revealing help, and explain why your method works.

Quick readiness check

For a non-square 6 cm by 4 cm rectangle, which candidate is a mirror line?

What you will learn

  • Use reflection or folding to test the whole boundary rather than merely equal areas.
  • Draw all distinct symmetry lines, including oblique lines, and justify failed candidates.
  • Distinguish a blank circle’s infinitely many axes from the symmetries of a physically decorated design.

Whole-design mirrors and turns

Use three complete outline cards and keep each boundary fixed while testing a reflected tracing. Card R is a 6 cm by 4 cm rectangle, with corners A(−3,−2),B(3,−2),C(3,2),D(−3,2). Card S is a non-square rhombus with diagonals 8 cm and 6 cm, with corners A(−4,0),B(0,−3),C(4,0),D(0,3). Card P is the oblique parallelogram A(0,0),B(6,0),C(8,3),D(2,3). Join each list in boundary order. Draw every mirror axis on each card, naming its location and showing a reflection or fold check. Explain why a diagonal splitting P into equal-area halves does not automatically make a mirror line. Use the coordinates to locate the cards, not to impose a distance-formula method.

Keep every corner,indentation and physical disk. Record all claimed mirror lines and distinct matching turns,plus an actual failed trial. Identity appears once in0≤θ<360°. A full-turn test anchor alone is not a unique nontrivial centre.

  • The supplied card is a non-square rectangle.
  • Adjacent side lengths are 6 cm and 4 cm.
Card R — blue givens, amber own completion, orange own tracingABCD

Blue: fixed givens. Amber: my entered completion, where required. Orange: the actual reflected or turned tracing of my complete current design. Physical disks keep their colour/category and radius. Labels and this key are explanatory.

My actual work on every card

Card R — my mirror-line constructions
Card R — a rejected mirror and an actual failed point or physical feature
Card R — my whole-design justification
Card S — my mirror-line constructions
Card S — a rejected mirror and an actual failed point or physical feature
Card S — my whole-design justification
Card P — my mirror-line constructions
Card P — a rejected mirror and an actual failed point or physical feature
Card P — my whole-design justification

My separate final conclusions

Give each card’s conclusions and reasoning independently. Correct final values do not repair wrong axes,centres,tracings or a missing corner.

Card R — separate final conclusions
Card S — separate final conclusions
Card P — separate final conclusions

Record complete working for every current card and your independent final conclusions.

Scope and review limits
  • Twelve fixed original Mathematics B line/rotation/comparison cases;every original card,complete ordered boundary,concavity and physical disk category/radius is retained.
  • Candidate coordinates are bounded by±20. Trial angles are integer degrees within one turn. Numeric overlap tolerance1e−7supports these fixed examples and is not a proof for arbitrary drawings.
  • A blank circle has an infinite line family;representative lines are not a finite total. Identity is counted once in0≤θ<360,and a full-turn test anchor is not a unique nontrivial centre.
  • The missing corner remains masked until the learner enters it. Wrong entered outlines and inactive fields are retained;parallel marks,centres and symmetry are never silently inferred from a wrong completion.
  • Student-selected four-equal-side alternatives require whole marked cards and different outcomes. Written exhaustiveness,minimum-angle and general-family arguments need human review. No marks,mastery,instrument competence,specialist signoff or formal assessment approval inferred.

A mirror line must preserve the whole figure

A line of symmetry is a full mirror line across which reflection maps the entire figure onto itself. Imagine folding the paper along that line, or reflect a separate tracing while keeping the original fixed. Every boundary segment and every true feature must coincide with a matching part. A line that divides the area equally need not pass this test.

Draw the candidate as one complete straight line, extending through and beyond the figure, rather than counting its two rays separately. Name where it passes, such as opposite side midpoints or two vertices. Try the reflection before accepting it: a failed corner, edge, indentation or coloured mark is enough to reject that candidate. A familiar polygon name can suggest candidates, but the complete given figure decides.

Find every axis, including sloping ones

A non-square rectangle has the two lines through midpoints of opposite sides; its diagonals are not mirror lines because the adjacent side lengths differ. A non-square rhombus instead has its two diagonals as axes. A square combines both types and has four. Do not turn the correct axis for one family into a rule for all quadrilaterals.

A kite with two different-length adjacent equal-side pairs has the diagonal through the vertices where the pairs meet as its one mirror line. In an equilateral triangle, each vertex-to-opposite-midpoint line works, giving three. A non-equilateral isosceles triangle has one, and a scalene triangle none. In particular a right triangle can be isosceles or scalene, so the word right does not determine a single mirror-line count.

Keep indentations and physical features

A concave boundary must be reflected in full. For a T-shaped outline, a candidate line must match both the broad top bar and the narrow stem, including the inward corners. Turning the page does not remove an axis; it turns the correct line with the figure. Horizontal and vertical are descriptions of a displayed orientation, not requirements in the definition.

Treat a printed disk, hole or colour as part of the design when the question says it is physical. Vertex labels and a separate explanatory legend normally identify parts without becoming decoration themselves. A blank circular region has every line through its centre as an axis, so there are infinitely many; draw representative diametral lines and state the whole family. One off-centre printed disk usually removes most of those axes because its centre must also be fixed by reflection.

Work with actual constructions and independent conclusions

Construct each full mirror line from two actual points. Retain the complete ordered boundary and every physical disk. Follow a failed boundary point or physical-category witness. Blank circles require several distinct representative lines and a whole infinite-family description.

Working and separate final conclusions begin blank. Record both current forms before comparing;study the explanation only after a complete actual attempt.

Edits,withdrawal,clear,reset,stage changes and changed source/session identity withhold earlier comparisons. Fixed checks approve no written proof,marks,mastery,physical instrument work,specialist review or formal assessment readiness.

Sources for this lesson

Pause and explain

A circular badge has exactly one small blue disk away from its centre. Which description gives every mirror line of the full design?

Put the idea to work

Worked example

Use three complete outline cards and keep each boundary fixed while testing a reflected tracing. Card R is a 6 cm by 4 cm rectangle, with corners A(−3,−2),B(3,−2),C(3,2),D(−3,2). Card S is a non-square rhombus with diagonals 8 cm and 6 cm, with corners A(−4,0),B(0,−3),C(4,0),D(0,3). Card P is the oblique parallelogram A(0,0),B(6,0),C(8,3),D(2,3). Join each list in boundary order. Draw every mirror axis on each card, naming its location and showing a reflection or fold check. Explain why a diagonal splitting P into equal-area halves does not automatically make a mirror line. Use the coordinates to locate the cards, not to impose a distance-formula method.

Show the worked solution
  1. On R, reflect across the horizontal and vertical lines through the rectangle’s centre. Each swaps equal opposite sides and the matching corners, giving its two midlines. A diagonal reflection would interchange unequal 6 cm and 4 cm directions, so the diagonal candidates fail.
  2. On S, reflect across AC and BD. The two equal-side halves on either side of each diagonal coincide, so both diagonals are axes. The lines through opposite side midpoints do not preserve this non-square rhombus.
  3. On P, a reflection across a diagonal or a centre midline leaves some corners or sloping edges unmatched. Its oblique, non-rectangular, non-rhombus outline has no mirror line.
  4. The diagonal of P does split it into equal-area triangles, but reflection does not superimpose those complete halves. Equal area therefore supplies no replacement for the overlap test. The line counts for R,S,P are 2,2,0.

Answer R has 2 axes, the two opposite-side midlines. S has 2 axes, its diagonals AC and BD. P has 0 mirror axes: equal-area halves do not guarantee reflection overlap. These are conclusions about the complete specified cards.

Try a topic test

Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.

Test this topic →

From guided practice to a new situation

Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.

1 · Guided

Use four complete marked outline cards: kite A(0,5),B(−3,0),C(0,−2),D(3,0), whose different-length equal-side pairs meet at A,C; an equilateral triangle with all three equal-side marks; the isosceles right triangle A(−2,0),B(2,0),C(0,2); and the scalene right triangle A(0,0),B(6,0),C(0,4). Join the coordinate lists in boundary order and retain the right/equal-side marks. Draw every full mirror line and test it by reflection of the complete outline. Explain why right triangle alone would not tell you the exact line count.

Give me a hint

Keep the kite’s different top/bottom portions, and separate an isosceles right triangle from a scalene right triangle.

Compare my reasoning
  1. In the kite, the equal adjacent pairs meet at A,C. Reflect across AC: B and D swap while A,C stay on the line, so this is one axis. Reflecting across BD would move the unequal top and bottom portions onto the wrong parts, so BD is not an axis.
  2. For the equilateral triangle, draw each of the three vertex-to-opposite-midpoint lines. Each exchanges two equal sides and preserves the complete triangle, so all three work.
  3. For the isosceles right triangle, draw the line from its right-angle vertex C to the midpoint of hypotenuse AB. Reflection exchanges the equal legs, giving one axis. The scalene right triangle has unequal side lengths and no reflection exchanging its full boundary, giving none.
  4. Thus the counts in the stated order are 1,3,1,0. A right angle alone does not say whether the two legs are equal; that missing condition changes the answer. Under the inclusive isosceles definition, an equilateral triangle is the three-axis special case, not a universal one-axis example.

Kite: 1 axis, AC. Equilateral triangle: 3 vertex-to-opposite-midpoint axes. Isosceles right triangle: 1 axis from the right vertex to the hypotenuse midpoint. Scalene right triangle: 0. The right-angle condition alone does not select between the last two results.

Look for these in your work

  • Draw full candidate lines on all four given figures without treating their rays as separate axes.
  • Accept exactly the axes that map the entire marked boundary onto itself.
  • Explain the 1,3,1,0 counts and the missing equality condition in a generic right triangle.
2 · Independent

Use unannotated complete outline cards. The concave T boundary is A(−3,2),B(3,2),C(3,0),D(1,0),E(1,−3),F(−1,−3),G(−1,0),H(−3,0), closed to A. The scalene triangle is A(0,0),B(5,0),C(1,2), closed to A. Draw and test every mirror axis, challenging vertical and diagonal guesses. Explain which indentation or side correspondence rejects a false candidate; do not replace the entire T by only its top bar. Record one rejected candidate with a specific boundary point that fails to land on its reflected partner.

Give me a hint

Reflect the whole boundary, including every inward corner; a triangle reflection would need a matching equal-side pair.

Compare my reasoning
  1. Trace all eight sides of the T, including its inward corners. Reflection across the vertical line through the middle of the bar and stem exchanges left and right boundary parts, so that full line is an axis.
  2. A horizontal reflection would send the upper bar to the lower stem region, and a diagonal reflection would turn the broad bar into an unmatched side feature. These failures show why the complete indentation and stem matter. The T has one axis, not several inherited from a rectangle drawn around its bar. For a specific failed point, the horizontal candidate y=0 sends A(−3,2) to (−3,−2), which is not on the original T boundary.
  3. For the triangle, test a line through each vertex towards the opposite side. A triangle mirror would fix one vertex and exchange the other two, forcing two corresponding side lengths to agree. This given scalene triangle has three unequal sides, so none of those candidates works.
  4. Record one axis for the T and none for the triangle. Leave failed candidates visibly distinguished from accepted axes, rather than presenting a guessed diagonal as a second solution.

T: 1 mirror line, through the middle of its bar and stem (vertical in this orientation). Scalene triangle: 0. The T’s whole indented boundary must match, and a scalene triangle cannot exchange two unequal sides under reflection. For example, reflection in y=0 sends A(−3,2) to (−3,−2), which is not on the T boundary, so that candidate fails.

Look for these in your work

  • Draw and test the T’s one axis while rejecting misleading bar-only and diagonal matches.
  • Justify no axis for the scalene triangle using a side correspondence.
  • Keep every indentation and closing side in the tracing rather than simplifying the outline.
3 · Transfer

Two circular badge designs have the same outer radius of 4 drawing units. One is blank. The other has exactly one small blue disk of radius 0.3 centred 2 units directly above the outer circle’s centre. Keep that blue disk as a true physical part of the second badge, while centre labels are explanatory. Draw representative mirror lines on the blank badge and describe all of them; draw every mirror line on the printed badge. Use a reflected tracing to show why at least one discarded line fails for the complete printed design.

Give me a hint

Test the physical blue disk as well as the outer curve. A line fixing a circular disk must pass through its centre.

Compare my reasoning
  1. On the blank circle, any full line through its centre reflects the whole circular region onto itself. Draw several diametral examples, including an oblique one, and state that every centre-line works: the line count is infinitely many, not the number of examples drawn.
  2. For the printed badge, the outer circle still requires an axis through its centre. The single off-centre blue disk must also map onto itself, so the same line must pass through the blue disk’s centre.
  3. Only one full line passes through both distinct centres. In the supplied orientation it is vertical, and reflecting across it preserves both circular regions.
  4. A horizontal centre-line sends the blue disk to an unprinted position below the centre, so it fails. The printed badge has exactly one axis; ignoring the decoration would give the wrong infinite count.

Blank badge: infinitely many axes, every line through the circle centre. Printed badge: exactly 1, the line through both circle centres. A horizontal reflection fails because the single blue disk would move to an unprinted location.

Look for these in your work

  • Draw representative centre-lines and state the infinite family for the blank badge.
  • Draw the printed badge’s unique common-centre line.
  • Demonstrate a failed reflection using the actual off-centre blue disk.

Common mistakes

  • Accepting a line because it divides the area equally or because it is a diagonal.
  • Counting only vertical or horizontal guesses, or ignoring inward boundary details.
  • Ignoring actual decoration, treating bookkeeping labels as decoration, or giving a finite count for every centre-line of a blank circle.
Recall without your notes

What can you explain now?

A diagonal divides a given oblique non-rectangular, non-rhombus parallelogram into two equal-area triangles. Is that enough to call the diagonal a line of symmetry? Describe the required test.

Compare with the explanation

No. Reflect or fold the complete figure across the diagonal and test full coincidence.

The two triangles can have equal area while their reflected boundaries do not coincide. A mirror line requires every corresponding boundary part to match, not merely two equal areas.

After trying it yourself, choose your next review. This is your self-assessment.

Your review choice appears on Today. Sign in to sync it across devices.

Continue to next lesson Back to Today

Make it stick

Explain a complete-figure reflection test. Contrast rectangle and rhombus axes, give a no-axis example, and explain what an off-centre physical feature does to a blank circle’s axes.

If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.

Keep learning Mathematics B

Pearson2026/2027 International GCSE entry manual Pearson Mathematics B official qualification
Course scope and assessment

Partial B-specific teaching: Number1A–K,Sets2A–I,Algebra3A–L,all14Functions source rows4A–N and Matrices5A–G have reviewed original teaching/worked/practice bundles. The27Functions lessons combine existing substantive theory and learner constructions with eight new variation-family lessons and the corrected composition counterexample. Twelve Matrices lessons supply seven further structural source links,with all six named transformation families required jointly for5F. Geometry 6F, 6G, 6H, 6I, 6J, 6K and 6L have reviewed joint teaching/practice bundles. Seven other Geometry rows and 31 rows in the four later topics remain unlinked. Those later topics remain unstarted. A structural source link does not establish exhaustive subskill,practical,specialist or formal assessment approval. No MathematicsA,Foundation or modular inheritance. Single Higher-tier linear4MB1; no Foundation or additional-Higher inheritance. These seven original Number lessons address1A–F; 1C needs both integer/root and fractional/negative-index strands. These seven lessons make no claim for later Number strands or other topics; consult their separate teaching map and actual lessons. Work exactly with original signed values and grouping; retain nonzero-denominator and real-root domains, principal even roots and signed odd roots. Surd rationalisation keeps the original denominator restriction even when a conjugate is used. Number-set membership uses the stated natural-number convention; irrationality proofs are outside1F. Model feedback is for self-checking, with human review of reasoning; no exam marks, mastery, specialist or formal-assessment approval. Both linear papers may draw on any topic. The2026/27 manual confirms standard November2026/June2027 and regional June2027 subject to centre location; the2016specification's January/June wording is historical. ISBN9780435044107 is verified metadata only; no Bbook chapter/body/Hub map or modular/onscreen route is verified. No4MA1 book or teaching credit is imported. Single Higher-tier linear4MB1. These eleven original Number1G–K lessons use exact given units, currency directions and proportional models; units and physical/count domains are explicit. Decimal-place/significant-figure answers preserve requested precision, and signed midpoint conventions and bound endpoint inclusion are stated. Source1G metric/SI and money needs all three measure/time/currency strands; 1H representations, ratios/proportion and percentages need all three strands. Bounds need both rounded-input and derived-quantity lessons, and standard form needs representation/comparison plus calculation/context lessons. This Number set does not complete any later Sets, Algebra, Functions, Matrices, Geometry, Mensuration, Vectors/transformations, Trigonometry or Statistics/probability topic. Structural links are separate from exhaustive subskill, human reasoning, mastery and formal-assessment approval. Original self-check practice only; no official marks are awarded. The2026/27 manual confirms standard November2026/June2027 and regional June2027 subject to centre location; no later examination-year availability is inferred. ISBN9780435044107 is metadata only: no verified B book-body/chapter/Hub mapping, no Mathematics A book inheritance and no B Foundation/modular/onscreen route. Single Higher-tier linear4MB1. These eight original Sets lessons cover membership and descriptions,universe-relative complement,union/intersection,inclusion,logical regions,two/three-set counts and feasibility. A source link requires its complete reviewed lesson bundle; number-set recognition1F is prerequisite context and gains no new link. Equality-allowing inclusion and proper subset are stated explicitly where the printed subset glyph is ambiguous. Missing universes,inconsistent counts and insufficient information are not replaced with invented diagrams or values. Two/three sets and the particular logical identities are chosen breadth,not a printed maximum or extra source row. Number1F’s irrationality-proof note is not a blanket waiver of Sets arguments and counterexamples. Your actual symbolic/Venn work and reasoning need human review; self-checks award no official marks or mastery/assessment approval. Standard November2026/June2027 and regional June2027 depend on the2026/27 manual and centre location; no later series is inferred. ISBN9780435044107 is B product/access metadata only; no verified B Sets chapter/body/Hub map or MathematicsA book inheritance. No Foundation,modular or onscreen B route is evidenced. Single Higher-tier linear4MB1. These eight original Algebra lessons address operations and integer/fractional indices with real domains,formula construction/substitution and subject changes,factorisation,cubic factor theorem including ax±b,cubic division and four operations with simple algebraic fractions. Each structural row needs its whole reviewed lesson bundle. Original denominator exclusions,principal square roots/branches and declared units remain part of the learner work. The finite symbolic checker accepts bounded explicit syntax,not every equivalent expression or explanation; unmatched alternative radical cancellation or general symbolic equivalence needs human review. A self-check or nonblank explanation does not award official marks or certify exhaustive subskills,reasoning,mastery,specialist or formal assessment readiness. Algebra3G–L and all later topics remain unmapped by this batch; Number and Sets links are separate. Standard November2026/June2027 and regional June2027 depend on the2026/27 manual and centre location; no later series is inferred. ISBN9780435044107 is B product/access metadata only; no verified Algebra body/chapter/Hub map or MathematicsA book inheritance. No Foundation,modular or onscreen B route is evidenced. Single Higher-tier linear4MB1. Five original equation lessons jointly link3G only when every teaching,worked,Guided,Independent and application strand remains intact: linear equations and contexts,quadratic factorisation,completing the square AND the quadratic formula,actual graphical quadratic construction,and cubic equations. Graph work requires learner-entered table values,labelled scales,actual points and curve strokes,zero-axis marks and readings. A generated ideal curve or algebra-only solution cannot substitute for that construction. Exact roots and approximate graphical readings are separate. Bounded symbolic and sampled geometry checks do not approve all equivalent methods,whole-curve smoothness,global reasoning,reading precision,mastery or official marks. Written explanations need human review; specialist and formal assessment approval remain pending. Algebra3H–L and all later topics remain unmapped by this batch; previous3A–F,Number and Sets are separate bundles. Standard November2026/June2027 and regional June2027 follow the2026/27 manual and centre location; no later entries are inferred. ISBN9780435044107 is metadata only; no verified Algebra body/chapter/Hub map or MathematicsA book inheritance. No Foundation,modular or onscreen B route is evidenced. Single Higher-tier linear4MB1. Both original3H lessons must remain complete: algebraic elimination/substitution with exact original-equation checks AND actual graphical simultaneous-equation construction on common labelled scales. Each graphical line needs the learner own calculated table,independently plotted points,two chosen retained anchors and an explicit straightedge-extension action. No generated ideal line or table substitutes for this construction. Vertical lines,parallel distinct lines,coincident lines,cropping,nonnegative context prices,exact check pairs and approximate readings remain separate. Finite rational-symbolic and geometric checks do not approve all alternative methods,written explanations,reading precision,physical instruments,mastery or official marks; specialist and formal assessment approval remain pending. Algebra3I–L and later topics remain unmapped by this batch. Entry context is2026/27 only,with regional options governed by centre location. ISBN9780435044107 is metadata only; no verified book-body/chapter/Hub map or MathematicsA inheritance. No Foundation,modular or onscreen B route is evidenced. Single Higher-tier linear4MB1. Original3I teaching includes substitution of the actual line into the quadratic,complete reduced equations,formula/factorisation or negative-discriminant reasoning,and separate partner recovery with checks in both originals. All four stages must remain available; Independent includes two distinct systems,no-real pairs and zero/fractional coordinates; Application explains one repeated contact. The finite exact rational polynomial checker requires a genuine quadratic after substitution and unrestricted real coordinates. Task-specific domains,lower-degree or line-component reductions and other methods require separate review. A supporting sketch does not replace algebra or certify graphical precision. Written reasoning,specialist and formal assessment approval remain pending; no official marks or mastery. Algebra3J–L and all later topics remain unmapped by this batch. Entry context2026/27 only. ISBN9780435044107 is metadata only; no book-body/chapter/Hub coverage or MathematicsA/Foundation/modular/onscreenB inheritance. Single Higher-tier linear4MB1,Algebra3J. Two original lessons jointly cover linear inequalities on number lines and simultaneous straight-line regions in two dimensions. Every Worked,Guided,Independent and Application construction is separate from its final answer. Negative scaling reverses order; open/closed endpoints and solid/dashed boundaries retain strictness. A finite integer list never replaces the real solution set. Closure corners may be excluded; unbounded rays continue beyond the displayed window. Empty planar claims use nonnegative-multiplier contradictions; the inclusive nonnegative-sum control is a single point. The checker uses bounded exact rational first-degree systems; the SVG is numerical display only,not approved graphical precision. No optimization or linear-programming coverage. Reasoning,specialist review and formal assessment approval remain pending; no official marks or mastery. Algebra3K–L and all later topics remain unmapped by this batch. Entry context2026/27 only. ISBN9780435044107 is metadata only; no verified book-body/chapter/Hub mapping or MathematicsA/Foundation/modular/onscreenB inheritance. Single Higher-tier linear4MB1,Algebra3K. One original lesson constructs quadratic-inequality sign charts and actual number-line unions across Worked,Guided,Independent and Application stages,with eleven separate constructions. Show the polynomial moved to zero,descending rational coefficients,discriminant,distinct exact roots,actual rational test substitutions,selected open sign intervals and zero membership. Include negative leading coefficients,repeated-root empty/singleton/punctured/all-real cases,exact irrational boundaries and no-real-root controls. Each final answer is entered separately. The bounded checker uses exact algebra for rational plus one quadratic radical; numeric SVG positions do not certify graphical precision. Nonperfect radical numerator times denominator is bounded by10^12; input rational coefficients by10^30; internal arithmetic by4096bits. Unsupported forms and unreadably close displayed points are rejected rather than rounded or merged. no official marks or mastery. Algebra3L and all later topics remain unmapped by this batch. Entry context2026/27 only. ISBN9780435044107 is metadata only; no verified book-body/chapter/Hub mapping or MathematicsA/Foundation/modular/onscreenB inheritance. Single Higher-tier linear4MB1,Algebra3L. Two original lessons cover constant differences and familiar common integer sequences through all eight Worked,Guided,Independent and Application stage definitions:thirteen actual sequence tasks and two explicit ambiguity proofs. Enter successive differences,exact signed/fractional continuations,actual powers,triangular seed sums,updated predecessor pairs and candidate-by-candidate prime certificates where relevant. Keep a separate independent final answer. A familiar finite prefix does not force a unique continuation:consistent declared alternatives are reported for discussion rather than automatically marked wrong. Named families are original examples under the source note,not an exhaustive list prescribed by Pearson. No compulsory nth-term or arithmetic-series sum is inferred. Exact rational input bounds10^30,prefixes2–16terms,continuations1–16terms,prime candidates2–10000 with at most128literal certificates,triangular seed0–64,power exponents0–24. Unsupported work is explicitly rejected. no official marks or mastery. All seven topics after Algebra remain unmapped by this batch. Entry context2026/27 only. ISBN9780435044107 is metadata only; no verified book-body/chapter/Hub mapping or MathematicsA/Foundation/modular/onscreenB inheritance. This first Functions lesson teaches finite supplied mappings through four stages and six original tasks. Draw your own arrows,record distinct images for every original input,and give a separate final classification and range. Missing and multiple images,valid many-to-one functions,unused targets and explicit domain limits are distinguished. This complete original finite-mapping record supports4B and contributes to the reviewed4A/4C/4Djoint bundles:All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map. Variable evaluation,real domains/ranges,composition and inverses have separate reviewed original lessons; this finite record does not replace them. Exact rational sets are bounded to16distinct elements and64entered arrows; unsupported work is rejected. Written reasoning requires human review; specialist review and formal assessment remain pending; no official marks or mastery. Single Higher-tier linear4MB1,entry context2026/27 only. ISBN9780435044107 is metadata only; no book-body,chapter or Hub verification or MathematicsA/Foundation/modular inheritance. Original polynomial function notation and deliberate substitution, with four stages and nine actual term-table tasks. Enter the whole input, domain decision, coefficients, powers, products, sum and later output changes; record a separate final answer. A complete incorrect attempt may study the explained reference but is not accepted by fixed comparisons. Exact rational polynomials are bounded to degree three and numerical or linear-in-a inputs; original domain holes are not cancelled away. The practical finite input set is retained even when arithmetic elsewhere is possible. This is introductory4C/4Dteaching, not a complete real-domain/range,composition or inverse bundle:All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map. Written reasoning needs human review. No official marks,mastery,specialist review approval or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27 only. ISBN9780435044107 is metadata only; no book-body,chapter or Hub verification or MathematicsA/Foundation/modular inheritance. Original selected real-domain/range teaching,with four stages,eight tasks and fourteen actual branch tables. Keep original denominator/radical conditions,stated restrictions,each branch image,attained endpoint input witnesses,units and separately entered final sets/input decisions. Seven bounded rule families and exact rational interval/point endpoints only; arbitrary expressions and irrational image endpoints are explicitly unsupported,not declared non-real. A complete incorrect attempt may study the explained reference but does not pass fixed comparisons. This is selected4Dteaching,not exhaustive Functions coverage:All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map. Composition,inverses and wider Functions have separate reviewed original teaching; these bounded calculations do not establish formal approval. Written explanations need human review. No official marks,mastery,specialist approval or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27 only. ISBN9780435044107 is metadata only; no verified book body,chapter or Hub mapping and no MathematicsA/Foundation/modular inheritance. Continuity questions are outside the cited4Drow. Original selected composition teaching,with four stages,eight tasks and24two-step input traces. Keep the rightmost-first order,both original domains,the outer-domain preimage,actual intermediate and final images,units and separately entered final sets/input decisions. Seven bounded rule families and exact rational interval/point endpoints only; arbitrary expressions and irrational image endpoints are explicitly unsupported,not declared non-real. A complete incorrect attempt may study the explained reference but does not pass fixed comparisons. This is selected4Eteaching,not exhaustive Functions coverage:All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map. General symbolic alternatives beyond this bounded self-check need human review; separate original inverse and other Functions lessons remain required. Written explanations need human review. No official marks,mastery,specialist approval or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27 only. ISBN9780435044107 is metadata only; no verified book body,chapter or Hub mapping and no MathematicsA/Foundation/modular inheritance. The4Estructural link requires this complete original teaching/worked/practice record and its corrected counterexample; it does not approve all symbolic alternatives. Original selected inverse teaching,with four stages,eight tasks,nine reversed branches and27 named inverse-input checks. Retain the original domain,actual image,stated target,one-to-one evidence,original holes,branch signs,return checks and swapped units. A larger target is not automatically the original image. An inverse undoes the mapping; it is not the reciprocal. Endpoint sets remain exact rational intervals. Selected simple square-root inverse values are compared exactly against the original branch and returned through the original equation; general symbolic forms and arbitrary inverse solving remain outside this bounded self-check. A squared return alone cannot choose an inverse side or change the original domain. A complete incorrect attempt may study the explained reference without passing fixed comparisons. All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map; general symbolic inverse alternatives need human review and the remaining Pearson curriculum is incomplete. Written derivations,reversed equations and whole-domain proofs need human review. No official marks,mastery,specialist approval or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27 only. ISBN9780435044107 is metadata only; no verified book body,chapter or Hub mapping and no MathematicsA,Foundation or modular inheritance Original selected variation teaching with four stages,eight tasks,26named prediction traces and18recovery targets. Calibrate the eight listed families from retained original observations and actual equation operations. Keep natural and stated input restrictions,all real recoveries,original-law return checks,change factors and coefficient dimensions. Exact irrational values remain defined and must be entered symbolically; selected equivalent square/cube-root values are compared exactly. More general symbolic coefficients/forms need human review. A complete incorrect attempt may study the explained reference without passing fixed comparisons. Written formulas,derivations,whole-domain arguments,unit prose and empirical model validity remain unreviewed. Finite observations do not prove a physical law. All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map; wider Functions and remaining Pearson teaching/practice are incomplete. No official marks,mastery,specialist approval or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27 only. ISBN9780435044107 is metadata only; no verified book body,chapter or Hub mapping and no MathematicsA,Foundation or modular inheritance. Original eight-family variation expansion: eight lessons,32 original cases and every Worked,Guided,Independent and application stage for each enumerated direct/inverse linear,square,cube and principal-root form. Together with the original general variation introduction,all nine complete same-record teaching/worked/practice bundles are required for one structural4Glink. Calibrate from original observations using actual reversible coefficient-equation operations; retain signed coefficients,the complete natural and stated domain,exact rational/simple-root predictions,all distinct admitted recoveries and their original-law returns,changed input and baseline values,ratio availability and coefficient dimensions. Both learner working and separately entered final answers begin blank; neither repairs the other. Edits,removed rows,withdrawal,reset and source/session/stage/revision changes revoke previous comparisons and references. A complete wrong attempt can study its explanation without passing. These construction cases use identified nonzero rational coefficients and nonzero rational calibration bases; origin ambiguity and zero-coefficient distinctions are taught explicitly,while more general symbolic forms need review. Software bounds are not syllabus exclusions. Written formulas,derivations,whole-domain arguments,unit prose and empirical model validity need human review. All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map. The wider Pearson curriculum remains incomplete. Automated controls and initial/completed rendering are checked; fresh mounted-browser and hosted four-stage interaction remain unverified. ISBN9780435044107 is metadata only; no full book body,chapter or Hub mapping is verified. Single Higher-tier linear4MB1,entry context2026/27only; no MathematicsA,Foundation,modular or later-series inheritance. No official marks,mastery,specialist approval or formal assessment readiness. Original selected rational Cartesian coordinate teaching with four stages and twelve tasks. Read and construct ordered pairs using the original separate axis scales,signed division counts and exact multiplication. Keep fractional between-grid coordinates,all four quadrants,both axes and the origin. A plotting window is not the whole plane:an off-window point remains real and is not clamped to an edge. Supplied closed time/temperature ranges govern the hypothetical context separately. Actual construction does not fill the independent answer. A complete incorrect attempt may study the explained reference without passing fixed comparisons. Written reasoning,broader plotting judgement and practical model validity remain for human review. All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map; the4Hstructural link requires this complete original teaching,actual point construction and all four explained stages. The remaining Pearson curriculum is incomplete; broader symbolic and practical judgements still need review. No official marks,mastery,specialist approval or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27only. ISBN9780435044107is metadata only; no verified book body,chapter/Hub mapping or MathematicsA/Foundation/modular inheritance. Original selected rational straight-line teaching with four stages and eight tasks. Build lines from learner-chosen anchors using their original independent axis scales. Any distinct admitted rational anchors are accepted, including reversed orders and off-window points. Actual coordinate rise/run, not ratios of picture lengths, determines gradient. Retain positive, negative, fractional and zero gradients, a rearranged equation, and vertical/coincident contrasts. Actual construction never fills the separate gradient/intercept answer. Rate units and intercept units differ. Extending a mathematical line does not extend a context domain; a complete-line intercept outside the domain is not an admitted initial observation. A complete wrong attempt may study the explained reference without passing fixed comparisons. Written reasoning and model validity need human review. All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map; the4Ilink requires this complete line-construction record and4Jalso requires all three original sparse-graph strands. The remaining Pearson curriculum is incomplete; broader symbolic and practical judgements still need review. No official marks,mastery,specialist approval or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27only. ISBN9780435044107is metadata only; no verified book body,chapter/Hub mapping or MathematicsA/Foundation/modular inheritance. Original selected sparse numerical graph teaching with three lessons,twelve lesson/stage groups and sixteen cases. Every curve retains all six source-family coefficients,with at least three zero coefficients. Exact original-input tables and real plotted points and curve strokes precede independent interpretations. Real pointer and keyboard coordinates remain unsnapped; explicit bounded drawing-position tolerances do not soften exact table arithmetic or original zero exclusions. Both original curves remain overlaid for intersection readings; no solutions,repeated contacts,irrational readings,context filtering and cancelled reciprocal exclusions are distinguished. Complete wrong attempts may study a separate explained reference without passing fixed comparisons. Finite table,vertex and segment samples do not prove a globally correct smooth curve. Written reasoning,drawing judgement and model validity need human review. All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map; the4Jlink requires these three original graph strands plus actual affine-line construction; 4Ktangent construction has a separate original lesson. No official marks,mastery,specialist approval or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27only. ISBN9780435044107is metadata only; no verified book body,chapter/Hub mapping or MathematicsA/Foundation/modular inheritance. Original drawn-tangent teaching with four stages and twelve tasks. The original curve and named point are supplied givens; both tangent anchors and the third reading vertex come from actual learner input. Signed coordinate changes,calculated quotient and independent final gradient/unit/context are entered separately. Adequate alternative and reversed anchors and either right-corner orientation are supported. Pointer coordinates remain unsnapped. Original independent scales,negative/fractional gradients,cubic crossings and later meetings,reciprocal exclusions and context restrictions remain explicit. A horizontal zero-rise control is degenerate rather than a nondegenerate right triangle. A vertical line has no finite gradient. An auxiliary tangent crossing zero does not repair a reciprocal curve domain. Complete wrong attempts may study a separate explained reference without passing. Finite approximate comparisons do not approve written reasoning,tangent judgement,physical validity or formal assessment. Written reasoning,tangent judgement and practical validity require human review. This complete reviewed drawn-tangent teaching/practice bundle supplies the4Kstructural link; All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map. Source mapping is separate from human drawing judgement and assessment approval. No4Ldifferentiation teaching is inferred from an internal exact reference. No official marks,mastery,specialist approval or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27only. ISBN9780435044107is metadata only; no verified book body,chapter/Hub map or MathematicsA/Foundation/modular inheritance. Original integer-power differentiation teaching with four stages and twelve tasks. Each displayed original term has actual coefficient, old-power, coefficient-times-power and lowered-power working. Constants use an explicit zero derivative without a spurious reciprocal. Reciprocals, fractional and negative coefficients, powers beyond cubics, sums, cancellation and original zero exclusions are retained. The learner enters a combined derivative and named-input substitution, then independent final expression, notation, value, rate unit, mathematical-domain and model-context decisions. Exact rational comparison accepts reordered and equivalent supported expressions without repairing original or added domain holes. The general integer-power rule is taught; the finite checker bounds are tool limits rather than syllabus exclusions. Complete wrong attempts can study an explanation without passing. The complete checked4Lteaching/practice bundle has a structural source link; All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map. Source mapping is separate from specialist and formal assessment approval. No4Mstationary/turning-point or4Nmotion completion is inherited. Written reasoning, model validity and specialist review remain pending. No official marks, mastery or formal assessment readiness. Single Higher-tier linear4MB1, entry context2026/27only. BookISBN9780435044107 is metadata only; no verified full book body, chapter/Hub map or MathematicsA/Foundation/modular inheritance. Original joint4Mteaching/practice bundle across three lessons and25cases,each with Worked,Guided,Independent and Application stages. Students enter their own graph observations,term-by-term differentiation,proposed derivative,original graph markers,complete cleared root lists,domain/context decisions,sign-chart witnesses and classifications. The global comparison retains stationary values,closed endpoints,open bounds,poles,infinities,attainment and all attaining inputs. Exact rational/surd and certified interval references support bounded self-checks; the finite sparse-curve and degree-five limits are tool bounds,not syllabus exclusions. Original punctures survive simplification and both graphs; constant and stationary-without-turn cases are explicit. Correct separate answers cannot replace incorrect actual working. Complete wrong attempts may study explained references without passing. The complete source and learner-route checks support a structural4Mlink only when all three original teaching/worked/practice records remain intact. All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map. The wider Pearson curriculum remains incomplete. Supplied graph stimuli do not award separate4Jcurve-drawing,4Kdrawn-tangent or4Nmotion coverage. Written reasoning,graph judgment,model validity and specialist review remain pending. No official marks,mastery or formal assessment readiness. Single Higher-tier linear4MB1,entry context2026/27only. BookISBN9780435044107 is official metadata only; no verified full book body,chapter/Hub map or MathematicsA/Foundation/modular inheritance. Original joint 4N teaching and practice across three lessons,25 cases and all twelve lesson/stage groups. Students enter term-by-term first and second derivatives,notation,units,all mathematical velocity candidates,original-domain/piece/context filtering,rest intervals and isolated/endpoint rest,reversal signs,every monotone leg,total distance,displacement and both averages. The two construction lessons require32 original graph constructions across their cases,with independently entered exact tables and axis quantities/units/scales,actual unsnapped points and stroke vertices,exact open-boundary decisions,separate branches at idealised speed jumps,and retained physical branches and ends beyond a cropped frame. Positive acceleration need not increase speed; speed cusps and mathematical two-sided versus physical one-sided gradients remain distinct. Practical rates retain their actual dependent/input units,positive magnitude,signed instantaneous value,original finite differences/averages,open physical ends and cancelled original holes. Correct independent answers cannot replace incorrect actual working. All three complete original teaching/worked/practice records are required for one structural 4N link; All14Functions source rows have reviewed structural teaching/practice links; other Mathematics B source gaps remain explicit in the current course map. The wider Pearson curriculum remains incomplete. This finite reference supports at most six continuous position pieces,eight terms per expression,powers -2 through6,complete cleared velocity degree at most five and exact rational/quadratic-field roots. These are software bounds,not syllabus exclusions; unresolved cases require review. Actual graph comparisons use finite position tolerances and65 probes per physical branch,including off-window portions; they do not prove a globally correct smooth curve. Automated calculation and drawing controls are checked; fresh browser interaction remains unverified. Original invented models and metadata-only bookISBN9780435044107 do not establish real physical/device/price validity,a full book body/chapter/Hub map,practical competence or specialist approval. No marks,mastery or formal assessment readiness. Single Higher-tier linear4MB1,exam entry context2026/27only; no MathematicsA/Foundation/modular inheritance. Original Mathematics B Matrices5A–G candidate: twelve teaching lessons,twelve worked examples,36 explained guided/independent/application practice tasks,and48 bound four-stage cases; all four specified reflection lines,rotations and enlargements have dedicated complete four-stage bundles. Matrix data,addition,multiplication,scalars,identity/zero,nonsingular2×2inverse,and plane transformations retain their own original givens. The learner enters blank working operands,intermediate results,constructions and separate final answers; edits,withdrawal,clearing,stage/reset and source/session/revision changes withhold old comparisons and explained references. Exact supported real square-root entries cover30°,45° and60° rotations in addition to quarter turns; the general cosine/sine formula is taught,while more general numerical trigonometry and equivalent forms outside the finite algebra engine require review. Written meanings,dimensions,units,geometric descriptions,drawn shapes and empirical validity need human review. All7Matrices source rows have reviewed structural teaching/practice bundles only while every original complete record remains intact. Row5Fjointly requires all six named transformation-family records,each with all four stages. Other Mathematics B source rows remain unlinked; see the current course map; the wider Pearson curriculum remains incomplete. ISBN9780435044107 is metadata only; no full book body,chapter sequence or Hub mapping is verified. Single Higher-tier linear4MB1; entry context November2026/June2027only. No MathematicsA,Foundation,modular or later-series inheritance. No fresh mounted-browser,hosted four-stage interaction,saved progress,official marks,mastery,specialist approval or formal assessment readiness is established. These two Mathematics B lessons reuse complete reviewed original StudyForA 2D and 3D Pythagoras teaching and eight stage cases. The Guided 2D case keeps both its missing-leg and exact/rounded missing-hypotenuse tasks; the 3D coordinate case still requires an originally unlocated horizontal projection endpoint. All actual triangle, hypotenuse, right-angle, section, foot and projection entries begin blank. Original numerical work, exact forms, requested precision, explicit units, equations and reasons are recorded separately from final answers. Correct answers never repair wrong geometry, and canonical figures appear separately only after a complete compared attempt. The original geometry engine and renderer are shared code; no other qualification completion or source metadata is inherited. The whole Geometry 6F source row also requires the complete acute-triangle altitude unit and all three jointly reviewed teaching and practice bundles, with actual learner routes. These two lessons alone earn no completed 6F link. Written reasoning, physical instruments and drawings, specialist approval and formal assessment remain separate. Single Higher-tier linear 4MB1; entry context November 2026/June 2027 only. No Foundation, modular or later-series inheritance. ISBN 9780435044107 is public metadata only; no verified full book body, chapter sequence or Teaching Hub mapping is claimed. Original content and local comparison controls are checked; each source link requires the complete joint bundle in the course map. Fresh mounted-browser events and saved account-progress isolation are unverified. This original acute-triangle lesson fills the specific 4MB1 Geometry 6F altitude subskill. It retains one worked example, guided practice, two separately required Independent examples and an application task across five bound cases. The source row also requires the complete 2D and 3D Pythagoras programme; this lesson alone earns no completed 6F link. Students construct an actual foot D, explain the perpendicular, retain both right-triangle calculations and record separate final answers. Incorrect geometry is not repaired by correct numbers or by studying a reference. Exact fractions and a positive irrational-height example are included; illustrative drawings are not measurement scales. Written equations, theorem reasons, assumptions, physical drawing/instrument accuracy and contextual decisions need human review. No marks, mastery, specialist approval or formal assessment readiness is established. Single Higher-tier linear 4MB1; entry context November 2026/June 2027 only. No Mathematics A, Foundation, modular or later-series inheritance. ISBN 9780435044107 is public metadata only; no full book body, chapter sequence or Teaching Hub content is verified. This original content and local comparison activity is part of the joint course bundle; a title or tag alone does not earn a source link. Fresh mounted-browser events and persisted account progress remain unverified. Nine Mathematics B circle lessons reuse reviewed original StudyForA teaching and geometry cases, with B-specific source, outcome and learner bindings. Geometry 6K jointly requires vocabulary, centre/chord bisection and converse, equal tangents and contact radii, centre/circumference angles including the reflex choice, diameter and same/opposite segment angles, the alternate-segment theorem with the selected tangent ray, and internal/external intersecting-chord products with positive ordered lengths and rejected algebraic roots. Geometry 6L requires the complete cyclic-quadrilateral lesson, including membership, opposite pairs, exterior-angle reasoning and the off-circle counterexample. Each lesson retains original teaching, an explained worked example and Guided, Independent and application practice. The interactive geometry begins with blank selections and responses; complete attempts can be compared and studied even when wrong. Written reasons, theorem use, application decisions, instrument competence and drawings still need human review. These links do not establish expert approval, marks, mastery or formal assessment readiness. Scope is single Higher-tier linear 4MB1, with November 2026/June 2027 entry context only. No Mathematics A, Foundation, modular, later-series or full-book completion is inherited. ISBN 9780435044107 is public metadata only: book bodies, chapter sequence and Teaching Hub material remain unverified. The other eleven Geometry rows and the wider Pearson curriculum remain separate gaps. Original content and local comparison controls are checked; source links require the complete bundles in the course map. Fresh mounted-browser events and saved-progress isolation are unverified.

StudyForA · Learn with understanding

Original teaching content and links to official sources. Check your exam year and qualification before using a resource.