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IGCSE · Pearson Edexcel · 4MA1

Construct other two-dimensional shapes

Construct a rectangle, parallelogram, rhombus and centred isosceles trapezium from sufficient labelled data, retaining instrument evidence and measuring checks.

Pearson 4MA1 · Shared Geometry · Construction · Foundation 4.5B · inherited by Higher
Exam scope and assessment notes

Shared Foundation/Higher Construction covers F4.5A–D: measurement and drawing, triangles and other 2D shapes, scale drawings, and both straight-edge-and-compasses bisectors. These six original lessons are linked to those syllabus rows; the links do not establish complete textbook coverage or specialist approval. Use the named instruments and retain your marks, arcs and joins. A numerical answer or displayed reference alone does not show instrument skill. Physical millimetre work needs a real ruler and a verified object or calibrated print; recheck calibration after printing, resizing or zooming. Measure only diagrams explicitly supplied as accurate for measurement. Virtual drawing units do not certify physical millimetres. Written answers and model comparisons are for self-checking, with no marks, mastery or formal assessment approval. The source is linear 4MA1 Issue 2, checked against November 2026/June 2027 entry context; regional options depend on centre eligibility. Modular qualifications remain separate. Publisher chapter links are navigation aids: the relevant final chapter body and Teaching Hub content remain unverified. Other syllabus sections remain separate.

Before you begin

  • Construct and measure calibrated segments and protractor angles.
  • Use known rectangle, parallelogram, rhombus and isosceles-trapezium conditions.
  • Transfer equal lengths with compasses and follow a labelled vertex order.

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

Quick readiness check

Which condition must be constructed at an adjacent corner of a rectangle?

What you will learn

  • Combine ruler lengths, protractor directions and compass transfers to construct complete ordered boundaries.
  • Use sufficient data and choose the intended circle intersection rather than relying on appearance.
  • Check stated quadrilateral conditions and measure requested diagonals or sides after construction.
Construct, measure and explain

Place your own instruments and retain the joins, rays and arcs. The givens are shown first; your construction stays at the positions you choose.

Worked construction

Construct rectangle ABCD with AB=6 cm and AD=4 cm, using ruler, protractor and compass length transfers as appropriate. Retain the right-angle rays and transferred-length marks. Complete the boundary in order and measure diagonal AC to the nearest millimetre on your own drawing.

Given construction dataGiven points and labelled calibrations are supplied data. Orange points, joins and rays, blue rulers, teal protractors and violet compass arcs retain the learner's actual placements. No completed reference outline is displayed initially. Screen size is not a physical millimetre calibration.

Drawing unit: cm. Printed graduations calibrate the virtual drawing; they do not certify physical paper or monitor size.

All submitted joins and arcs stay visible. Select a recorded ruler or protractor to inspect its graduations; other instruments retain their actual footprints. Long lines and rays are cropped to this viewing frame.

Coordinates describe the virtual drawing in cm; they are placement controls, not endpoint readings. Positive angles turn anticlockwise; negative sweeps turn clockwise. Clicking chooses a visible position. It does not move an instrument onto a reference answer.

Choose what a drawing click places
Constructed points

0 of 4 points recorded. Editing creates a draft; it does not silently move retained work.

Instrument work

Place and read the base ruler — place the ruler in drawing units (cm).

0 of 10 instrument traces recorded. All remain visible; choose a step to inspect its graduations.

Read or use my recorded ruler

These readings come from your actual ruler placement. A misplaced ruler keeps its offset; this tool does not report the ideal endpoint reading.

Find intersections of my retained traces

Intersections use the actual arc sweeps and line extents. A full circle or supporting line cannot supply a crossing outside a traced arc, ray or segment.

Measurements and explanation

This is a fixed mathematical comparison. A complete written response records an attempt; a teacher still needs to review the reasoning. Virtual graduations do not establish physical ruler, protractor or compass skill, and no marks or mastery are awarded. Verify physical calibration and recheck it after any print or zoom change.

Translate conditions into instrument operations

Read the vertex order before drawing: ABCD means join A to B to C to D and back to A. Establish a labelled base with a ruler, then turn each remaining condition into an operation. A right angle needs a properly aligned protractor ray; an equal distance can be transferred with compasses. Retain the rays and arcs so another person can see how the given conditions were met.

A named family alone does not give all the needed dimensions. A rectangle needs adjacent lengths and right angles, while two adjacent lengths of a parallelogram still leave its opening angle free. Use the supplied angle or other sufficient condition to determine the intended drawing. If a condition is missing, say what remains undetermined rather than choosing a shape simply because it looks familiar.

Use intersections to complete the boundary

A point may need to be a given distance from two already located vertices. Draw a circle or arc with each distance as its radius and use a crossing that satisfies the boundary order and the stated side of the base. There may be another circle crossing; check it against the requested shape rather than assuming every crossing gives the same quadrilateral.

For a rhombus constructed from a diagonal and a side length, equal-radius arcs centred at the diagonal endpoints locate the two remaining vertices on opposite sides of that diagonal. For a centred isosceles trapezium, the difference of the parallel-base lengths is shared equally between the two offsets. Draw the perpendicular height and its perpendicular top guide before marking the shorter base. Those conditions must come from the givens, not from a precompleted reference picture.

Check the construction rather than replace it

Once the boundary is complete, recheck its required lengths, right angles, parallel sides and equal-distance transfers. Measure a requested diagonal or sloping side on the actual accurate drawing and report the requested precision. Its ideal model may contain an exact root, but no Pythagoras or coordinate calculation is required as the learner’s construction method here.

The geometric properties explain why the method works; they do not turn a visual resemblance into proof that the conditions were satisfied. Keep the given labels separate from newly measured values. Constructing one of these shapes does not automatically complete a separate symmetry, transformation or formal bisector programme, and a finished reference shown after the attempt does not establish that the learner used the instruments.

Sources for this lesson

Pause and explain

Two adjacent parallelogram lengths are 8 cm and 3 cm. Which additional datum can fix a nondegenerate opening?

Put the idea to work

Worked example

Construct rectangle ABCD with AB=6 cm and AD=4 cm, using ruler, protractor and compass length transfers as appropriate. Retain the right-angle rays and transferred-length marks. Complete the boundary in order and measure diagonal AC to the nearest millimetre on your own drawing.

Show the worked solution
  1. Draw AB=6 cm. At A construct a perpendicular ray on the chosen upper side; at B construct a perpendicular ray on that same side, using the correct protractor alignment.
  2. Transfer 4 cm onto the ray at A to locate D and onto the ray at B to locate C. Join D to C, retaining the right-angle and length-transfer evidence.
  3. Check opposite sides and right angles, then draw and measure AC. The ideal diagonal is about 7.211 cm, giving a nearest-millimetre reference of 72 mm, or about 7.2 cm.
  4. The diagonal reading checks the constructed rectangle but does not replace it. Keep the requested given side lengths distinct from the approximate measured diagonal.

Answer Construct the 6 cm by 4 cm rectangle with its right-angle and transfer marks. Diagonal AC has reference measurement about 72 mm=7.2 cm.

Try a topic test

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

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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

Construct parallelogram ABCD with AB=7 cm, AD=4 cm and ∠DAB=60°, using D above AB. Use a protractor and length transfers to locate the missing vertices. Retain the two circles used to complete C, choose the upper completion satisfying the vertex order, and measure both diagonals to the nearest millimetre.

Give me a hint

Locate D first. C must be 4 cm from B and 7 cm from D; test the circle crossing against the required parallelogram.

Compare my reasoning
  1. Draw AB=7 cm. At A construct the upper 60° ray and transfer AD=4 cm onto it with compasses to locate D.
  2. Draw an arc centred at B with radius 4 cm and an arc centred at D with radius 7 cm. Select their upper crossing as C, then join BC and CD in the stated boundary order.
  3. Check the opposite side lengths and parallel directions. The other circle crossing is below AB and does not give the requested upper parallelogram in this vertex order.
  4. Measure both diagonals. Ideal nearest-millimetre references are AC≈96 mm=9.6 cm and BD≈61 mm=6.1 cm. As an angle check, the interior angles alternate 60°,120°,60°,120°, but the numerical checks do not replace the construction.

Construct the upper parallelogram from the 60° ray and two transferred distances. Reference diagonal readings: AC≈96 mm=9.6 cm and BD≈61 mm=6.1 cm.

Look for these in your work

  • Locate D with the named angle and the 4 cm transfer.
  • Retain both completion arcs and justify the correct C crossing.
  • Measure both diagonals and distinguish their approximate readings from the given lengths.
2 · Independent

Construct rhombus ABCD with diagonal AC=6 cm and all four sides 5 cm. Use compasses to locate the two remaining vertices on opposite sides of AC. Join the vertices in boundary order, keep both arcs and measure diagonal BD on your accurate drawing.

Give me a hint

Each missing vertex must be 5 cm from both A and C. Use both circle crossings.

Compare my reasoning
  1. Draw and label the diagonal AC=6 cm. Draw equal-radius arcs of 5 cm centred at A and C.
  2. Use the two crossings on opposite sides of AC as B and D. Join A-B-C-D-A; taking both missing vertices on the same side would not give the requested boundary.
  3. The four boundary sides each inherit their 5 cm length from the compass radii. Check those transfers and retain the arcs.
  4. Join and measure BD. Its ideal reference is 8 cm, or about 80 mm. This is a measured construction check, not a request to calculate an unknown diagonal with private coordinates.

Construct the rhombus using both 5 cm arc crossings across the 6 cm diagonal. Reference measurement: BD≈8 cm=80 mm.

Look for these in your work

  • Use the diagonal as the given base for the two equal-radius arcs.
  • Locate both missing vertices on opposite sides and join the correct boundary.
  • Retain the arcs, check all four side lengths and measure BD.
3 · Transfer

Construct an isosceles trapezium ABCD with AB=8 cm, DC=4 cm parallel to AB, perpendicular separation 3 cm, and the shorter base centred above the longer one. Use a ruler and protractor for the base, perpendicular height and parallel guide, and compasses for length transfers. Retain the height and parallel-guide construction. Measure a sloping side and diagonal AC to the nearest millimetre, and explain how the centred condition is used.

Give me a hint

Split the difference of the base lengths equally, and locate the upper guide by two right-angle operations.

Compare my reasoning
  1. Draw AB=8 cm. At A construct a perpendicular height AE=3 cm. Through E construct a line perpendicular to AE, so this top guide is parallel to AB.
  2. The total base-length difference is 8−4=4 cm, shared as 2 cm at each end. Along the upper guide mark D 2 cm from E and C 6 cm from E.
  3. Join AD and BC. Check that DC=4 cm, that the guide separation is 3 cm and that the two sloping sides agree, giving the specified centred isosceles trapezium.
  4. Measure one sloping side and AC. Ideal nearest-millimetre references are about 36 mm=3.6 cm for a sloping side and 67 mm=6.7 cm for AC. Keep the guide and right-angle evidence.

Construct the centred 8 cm/4 cm parallel bases at 3 cm separation. Reference measurements: sloping side≈36 mm=3.6 cm; AC≈67 mm=6.7 cm.

Look for these in your work

  • Use the 3 cm perpendicular height and a genuinely parallel upper guide.
  • Derive the equal 2 cm end offsets from the centred-base condition.
  • Retain construction marks and measure the requested side and diagonal to the stated precision.

Common mistakes

  • Joining vertices in the wrong order or accepting the wrong circle crossing.
  • Assuming a named shape or two adjacent lengths uniquely fixes an opening angle without sufficient data.
  • Giving calculated diagonals or a precompleted outline instead of retaining the requested instrument construction and measured checks.
Recall without your notes

What can you explain now?

All four sides of a rhombus are specified as 3 cm, but no angle or diagonal is supplied. Does that determine a unique non-square outline?

Compare with the explanation

No. The opening angle can vary; another sufficient condition such as an angle or diagonal is needed.

Equal side lengths constrain the family but allow differently slanted rhombi. A chosen appearance cannot supply the missing condition, and a square is a possible special opening unless excluded.

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

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Make it stick

Explain how given lengths and angles become ruler, protractor and compass operations. Describe a correct intersection choice and why measuring a diagonal is a check after constructing the full boundary.

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 A

Course scope and assessment

Linked teaching: sections 1.1 to 1.11, 2.1 to 2.8, 3.1 to 3.4,4.1–4.11 and5.1–5.2 and6.1–6.3; 2.5, 3.2,3.4 and5.1 are Higher only. This includes Foundation content inherited by Higher and Higher extensions for recurring decimals, surds, fractional powers, algebraic sets, Venn counts, repeated percentage changes, calculations with measurement bounds and standard-form application problems. Algebra includes Foundation symbols, integer index laws, substitution, like terms, brackets and monic factorisation, plus Higher fractional indices, multiple brackets, non-monic factorisation, algebraic fraction operations with domain restrictions, completing the square and proofs. Formulae include derivation from words and diagrams, substitution, single-occurrence subject changes including squares and roots, and Higher repeated-subject and harder power/root rearrangements. Linear equations cover both sides, brackets, fractional coefficients and constructing models from data. Section 2.5 adds all eight direct/inverse x, square, cube and square-root proportion families with actual graph exploration and domain checks. Section 2.6 adds shared elimination and substitution, exact fractions, contextual feasibility and repeated or inconsistent conditions; the additional Higher graphical lesson interprets genuine-line intersections, vertical lines and off-screen crossings. Section 2.7 adds Foundation monic quadratic factorisation, with Higher general factorisation, quadratic-formula and completing-square alternatives, context derivation and line–parabola/line–circle systems including full branches and exact paired solutions. Section 2.8 adds required open/closed number-line intervals, linear and compound solving, construction and identification of Cartesian regions, and Higher quadratic sign intervals and harder linear regions. Its Cartesian boundary-drawing convention note does not remove number-line endpoint requirements. Section 3.1 adds term-to-term and position-to-term generation, integer continuation and linear nth terms, plus Higher arithmetic a,d recovery, the general nth-term formula and finite arithmetic sums. Section 3.2 adds Higher-only mappings, both function notations, actual domain/range reasoning, composition in Pearson order with original restrictions, and affine/rational/restricted-branch inverses. Section 3.3 has nine shared coordinate, straight-line, travel, speed, conversion and quadratic-plotting lessons, followed by two additional Higher line-equation lessons, four Higher graph-family lessons, nine transformation/equation-recovery lessons and three drawn-tangent/intersection lessons. All nine Foundation source rows have lesson links, with paired interpretation and linear/quadratic plotting breadth guards. The broad additional Higher H3.3A row requires integer polynomial/cubic, sparse mixed reciprocal, degree sine/cosine and degree tangent lessons with every practice stage. H3.3B requires all four transformation forms across linear, quadratic, degree sine and degree cosine functions in eight core lessons; H3.3C also requires their algebra recovery and the ninth domain/equivalence/order synthesis lesson. H3.3D requires drawn-tangent construction and signed rise/run using actual units; calculus is not a replacement. H3.3E requires both line/quadratic and genuine line/cubic intersections and their nonlinear-minus-linear difference graphs, with all practice stages. All sixteen Graphs source rows now have teaching and staged-practice links; exhaustive subskill approval, mastery and assessment readiness remain unestablished. Section 3.4 adds six Higher-only lessons for variable rates, integer-power differentiation, gradient/rate conditions, stationary coordinates classified by original graph shape, one-dimensional motion and other practical models. H3.4C requires gradient and stationary slices; H3.4E requires both motion and other-practical slices. Preserve original domains, negative-power exclusions, admissible counts and boundary candidates. All five source rows have structural links, not exhaustive subskill approval or specialist/assessment validation. Section4.1 adds six shared Foundation/inherited-Higher lessons for selected acute/right/obtuse/reflex arcs, point/straight/intersection and parallel-transversal angles, triangle sums/exteriors, isosceles/equilateral and right/mixed triangles. All four shared rows have structural links; B requires both local and parallel strands and D both special and right-triangle strands, each with every practice stage. No additional H4.1 rows are invented. Preserve labelled geometry and reasons, the auxiliary-parallel triangle-sum argument, actual straight extensions, inclusive equilateral/isosceles and right-isosceles categories, and impossible/insufficient-data checks. Section4.5 constructions,4.4 measurement/bearings and the full H4.7 reasoning scope remain separate, without a blanket formal-proof waiver. Section4.2 adds seven shared Foundation/inherited-Higher Polygons lessons for all nine named polygon examples, convex/concave quadrilateral sums, all six named quadrilateral property families, general/regular polygon angles and congruence correspondence. Its seven rows A–G have structural links, with no additional Higher rows; C requires both family lessons and every practice stage. F/G remain two distinct published IDs supported by the same congruence lesson. Rhombus/square and kite endpoint-angle bisection and isosceles-trapezium equal diagonals are conservative standard-property breadth, not invented verbatim source bullets. Preserve reflex interiors, valid internal triangulations, local trapezium/kite conventions, exact integer side counts and impossible-data guards. Section4.3 symmetry,4.5 formal constructions,4.11 similarity and the full H4.7A reasoning programme remain separate. Literal book tags omit A; G has no Hub tag, and the Book2 map/proof congruence location and chapter7 page-range conflict remain unresolved. Section4.3 adds three shared Foundation/inherited-Higher Symmetry lessons for the one F4.3A source row, requiring every lesson and practice stage for the joint line/rotation capabilities. Draw all mirror lines, test a fixed original against a separate tracing about a chosen centre, count identity once and distinguish order1 from a blank circle’s non-finite rotations. Preserve indentations and true physical disk/colour features; the chosen missing-vertex parallelogram completion is original breadth, not an extra row or4.5construction credit. No additional H4.3 row is invented. The sole literal book link is Book2 Shape and Space6; no Book1 tag or explicit4.3Hub tag is invented, and its mapped chapter body/full final-book alignment remains unverified. Section4.5construction,5.2transformations,4.11similarity and full Higher reasoning remain separate. Section4.4 adds eight shared Foundation/inherited-Higher Measures lessons for seven A–G source rows and no additional Higher rows. Use complete instrument-scale, time-interval, sensible-estimate, nearest-degree protractor and three-figure-bearing teaching. F4.4F requires the full speed lesson; broad F4.4G requires speed, density and pressure, each with its worked explanation and every practice stage, with source binding on the same complete record. Preserve calibrated ticks and actual instrument action, compatible units, midnight/day order, approximate readings and north conventions. Keep numerical references hidden until calibrated attempts. Time recovery requires positive speed; at zero speed positive distance is impossible and zero distance alone is underdetermined. Density uses positive volume, displacement differences and explicit additive-volume assumptions; pressure uses the given formula, supplied forces and positive contact areas. Literal book navigation names only D and G; no A/B/C/E/F tags are invented, and Book1 map255–268/proof256–269 remains unresolved. These structural links do not complete4.5 instrument/compass constructions or scale drawings,5.2 transformations or formal assessment. Section4.5 adds six shared Foundation/inherited-Higher Construction lessons for four A–D rows and no additional Higher rows. A requires both nearest-millimetre measurement and actual line drawing. BroadB requires complete triangles and other two-dimensional shapes; broadD requires both straight-edge-and-compasses bisectors. Source binding and complete teaching/worked/all three practice stages must belong to the same required record. Use real ruler, protractor and compass action with retained construction evidence, physical calibration and honest approximate readings. Keep private endpoint readings, pose coordinates, solved vertices/crossings and reference directions hidden before instrument attempts. Respect valid mirror branches and selected minor/reflex angles; reject impossible triangles, insufficient data and degenerate crossings. Scale drawings require construction before measuring the unknown, compatible units and a labelled positive scale; drawing placement offsets remain givens. Literal book navigation names B/C/D only in Book2 Shape and Space6 with Hubs37/36/38. A has no literal chapter/Hub tag and no Book1 tag is invented. Public proof contents agree with map128–160 and show generic Constructions139, but the relevant body, full-book/Hub content and exact subtype pages remain unavailable. These structural links do not grant4.6 circle properties,4.7 whole geometrical reasoning,4.8 trigonometry,4.9 mensuration,4.11 maps/similarity,5.2 transformations or loci credit. The nearby circle formal-proof note is not imported. Section4.6 adds nine original Circle properties lessons for two shared Foundation and three additional Higher rows. The first three shared lessons cover all nine named parts, both chord/centre implications and both tangent facts. F4.6B requires both chord and tangent lessons. Additional Higher H4.6A requires both internal-chord and external-secant products with original named lengths, positive lengths and correct internal/near-far point order. H4.6B requires actual concyclic boundary vertices. H4.6C requires all five theorem parts across centre/circumference, diameter/same-segment, cyclic-opposite-angle and alternate-segment lessons. Every required slice needs substantive teaching, explained worked work and all three practice stages on one source-bound record; no half-row or untagged duplicate closes the bundle. Keep given marks separate from derived marks and retain selected major/minor arcs, tangent rays and physical algebraic-root domains. The no-formal-proof note belongs to H4.6C, not a blanket H4.6A/H4.7 exemption. Literal Book2 chapter5 tags F4.6B/H4.6B/H4.6C and chapter8 tags H4.6A/H4.6C are navigation only; no F4.6A or Book1 tag is invented. Chapter8 map326–349 versus proof chapter-start325 and next chapter349 remains unresolved; relevant final bodies and Hub content are unverified. These structural links do not complete construction, whole geometrical reasoning, trigonometry or mensuration, or establish specialist approval, mastery or formal assessment. Section4.7 adds five original Geometrical reasoning lessons for one shared F4.7A and one additional H4.7A row. The shared row jointly requires line/triangle, polygon and chord/tangent numerical reasoning, including lengths; the Higher row jointly requires both circle and mixed-angle standard-statement chains. Every required record needs substantive teaching, its explained worked example and all three fresh practice stages, with the source ID on that same complete record. Preserve actual diagram hypotheses, common arcs, contact radii, selected tangent rays, cyclic/straight point order, valid internal triangulations and the unknown regular-polygon outline after deduction. Each geometric equation needs a named reason; a correct number or sufficient text length does not validate an arbitrary written argument. The H4.6C formal-theorem-proof note remains local, not a blanket4.7 waiver. Only literal H4.7A Book1 Shape and Space1/Hub89,137,138,139 navigation is used; no Foundation4.7A or Book2 tag is invented. Public Book1 chapter60–99 is available but does not establish full Higher circle-angle or Hub body scope. These links do not award4.5construction skill, specialist approval, mastery or formal assessment. Section4.8 adds eleven original Trigonometry and Pythagoras’ theorem lessons for three shared F4.8A–C and six additional H4.8A–F rows. The first four are shared; the last seven are additional Higher. F4.8B jointly requires lengths with all acute ratios and inverse-angle work; H4.8C jointly requires sine-rule and cosine-rule teaching. Every row needs all its named source-bound records, substantive teaching, explained worked work and every Guided/Independent/Transfer stage. Preserve both missing-leg and missing-hypotenuse Pythagoras, signed bearing components with local north, all three obtuse functions, actual elevation/depression horizontals, admissible SSA branches and included-angle area restrictions. Three-dimensional work requires perpendicular sections and the actual foot/projection for a line-plane angle; plane-plane angles are excluded. Positive physical lengths, inverse domains, triangle inequalities, degree mode, exact forms and final-only rounding remain explicit. Chosen SSA two/one/no and inverse-area comparisons are safeguards, not extra syllabus rows. Literal navigation uses Book1 SS1–4 only: no Book2 tag or dedicated H4.8A Hub is invented. Hub145 is tagged F4.8A in SS1 and H4.8D in SS3; the former title does not extend Foundation into3D. Public Pythagoras body74–76 is available, but SS2/3/4 bodies and Hub content are unverified. SS2 map176–197 versus summary198, and SS3 map243–254 versus proof-start244/summary255 remain unresolved. No4.5construction,4.9mensuration, full-book, specialist, mastery or formal-assessment credit follows from these structural links. Section4.9 adds eight original Mensuration lessons for five shared F4.9A–E and one additional H4.9A row. The first six are shared; the last two are Higher. F4.9E jointly requires complete circle and semicircle/compound-boundary lessons; H4.9A jointly requires degree arcs/perimeters and sector-area/recovery lessons. Every required source-bound record needs substantive teaching, its explained worked example, checks and all Guided/Independent/Transfer stages. Retain both-direction linear/area conversions, exposed polygon boundary traces and internal joins, triangle/rectangle decomposition and contained disjoint cutouts, outside perpendicular heights, both parallelogram/trapezium methods, radius/diameter recovery and semicircle arc-versus-perimeter distinctions. Preserve major/remaining sector sweeps, positive physical roots, inverse dimensions, annular inner arcs and radial gaps, compatible square/linear units and question-specific precision; no universal3sf rule is invented. Radians are excluded; ordinary sector arc-plus-two-radii boundaries require0<θ<360, while a full disk has no radial cuts. Literal Book1 SS1 tags B/C/D/E and HigherA with Hubs47/48/118, plus Number4A/Hub14, are navigation only; no Book2 tag or verified Hub body is inferred. Public SS1contents summary98 versus actual99 and Number4map198–206 versus proof199–207/next208 stay explicit. Chosen compound/inverse/annular safeguards do not add source rows or grant construction, volume, similarity, full-book, specialist, mastery or formal-assessment credit. Section4.10 adds nine original 3D shapes and volume lessons for six shared F4.10A–F rows and one additional H4.10A row. The first seven are shared; the final sphere and right-cone lessons are additional Higher. Teach all seven named solid families, complete face/edge/vertex incidence with hidden features, planar triangle/rectangle surface inventories and cylinder surfaces with actual open/closed conditions. F4.10E requires both complete prism and cylinder-volume slices; H4.10A requires both complete sphere and right-cone surface-and-volume slices. Every required source-bound record needs substantive teaching, worked methods, checks and all Guided/Independent/Transfer stages. Preserve actual face altitudes, positive inverse dimensions, full-length groove conditions, internal capacity and fill levels, contact-patch removal, cubic unit factors and1L=1000cm³. Curved-solid tasks state their flat-face/rim/apex convention without inventing a universal mark-scheme count. Nets, joins, inverse applications and solid hemispheres are chosen breadth, not extra official rows or instrument, frustum, similarity, pyramid-volume or hollow-capacity credit. Keep exact values/π and question-specific precision, including explicit significant trailing zeroes or scientific form. Literal Book2 Shape and Space9 tags C/D/E/F and HigherA are navigation only; no A/B or Book1 tags are inferred. Hubs56/57/55/84/131 do not establish body coverage, and no F4.10F Hub tag is invented. Map359–385 versus proof358–384/next385 remains unresolved; relevant chapter body and full-book/Hub content are unavailable. Specialist, formal-assessment and mastery approval remain pending. Section4.11 adds seven original Similarity lessons for exactly two shared F4.11A/B rows and three additional H4.11A/B/C rows. The first four are shared correspondence, forward/inverse lengths, maps and plans; the final three cover area factors, volume factors and mixed problems. F4.11A requires both complete correspondence and length slices, and F4.11B requires both map and plan slices, with source binding, substantive teaching, worked methods, checks and every explained Guided/Independent/Transfer stage in the same actual record. Retain matching angles and every corresponding side, concave reflex corners, positive factors, inverse recovery, parallel/shared-vertex hypotheses, whole/part order, compatible units, route versus direct distance, and uniform print-resizing scale recovery. Higher work distinguishes k, k² and k³, positive roots, similarity hypotheses, unit powers, actual closed-cuboid total surfaces, physical dimensions, exact money before rounding, and parallel-section cone subtraction as a chosen application. No extra official row, transformations, instrument calibration, formal construction or general frustum-formula credit is claimed. Literal Book2 Shape and Space6 F4.11B/Hub36, Shape and Space7 F4.11A/Hub85, and Shape and Space9 H4.11A/B/C with Hubs143/144 are navigation only, with no Book1 tag invented. Shape and Space6 map128–160/proof128/summary159/next161, Shape and Space7 map223–248/proof222/summary247/next248, and Shape and Space9 map359–385/proof358/summary384/next385 remain explicit. The actual proof places Similar shapes at147 under Shape and Space6 while the literal F4.11A map tag remains under Shape and Space7; this topic-location conflict is unresolved. Relevant chapter and Hub bodies are unavailable; no full-book, specialist, formal-assessment or mastery approval follows. Section5.1 adds nine original additional Higher Vectors lessons for exactly H5.1A–G and no shared Foundation rows. All required source-bound notation, scalar, arithmetic, magnitude, route, position/division, parallel/collinear, simple-proof and intersection strands need substantive original teaching, an explained worked example and exactly one complete Guided/Independent/Transfer task in the same record. Preserve directed endpoints, signed/scalar and zero-vector exceptions, exact fractions and radicals, final-only rounding, current own head-to-tail joins, one-origin positions, t=0/t=1 endpoints and external points without clamping. Geometric conclusions require actual nonzero, nonparallel, noncollinear or simple-boundary hypotheses; formal two-to-four-symbol planar identities do not assert an independent spatial basis. H5.1G requires genuine explained geometric proof, not numerical resemblance or unchecked text. The H4.6C local theorem-proof note is not a blanket vector-proof waiver. Literal Book2 Shape and Space10 H5.1A–G map427–450/proof426/summary449/next450 remains unresolved; Hub167 covers A/B/C/D/F,168 A/E and169 G. Navigation does not establish modular equivalence. No Book1 tag or unseen Vectors chapter/Hub body is invented: the public uncorrected2025proof exposes contents and Number8 body, not Vectors. November2026/June2027 linear entry and regional-centre limits remain separate. Full-book, specialist, mastery and formal-assessment approval remain pending. Section5.2 adds twelve original shared Transformation geometry lessons across exactly F5.2A–M and no additional Higher row. Full source-bound bundles require substantive teaching, explained worked and exactly one complete Guided/Independent/Transfer task in each record. Retain every labelled corner and corresponding trace, signed/general rotations, complete equivalent mirror lines, common translation columns, rigid distances/angles, positive and fractional factors, supplied/free centres and factor1 identity exceptions. General-degree written3dp is separate from unrounded geometry. Ordered compositions are chosen breadth rather than an extra source row; compare both orders, including commuting perpendicular reflections, and distinguish reverse order from the inverse. Source/book/year and proof/physical-construction limits remain explicit. Graphical representation6.1 adds ten original lessons: six shared Foundation tabulation/two-way/pictogram/bar/pie/interpretation slices and four additional Higher histogram construction/reading and cumulative construction/use slices. Each complete source-bound record and every practice stage are required; tables or diagram names alone do not establish actual construction. Keep scales/units/keys, zero categories, unequal continuous widths and density/area, hidden missing calibration and pie labels, uniform partial-class estimates, cumulative boundaries and nonunique flat inverses. No Statistical measures6.2 or Probability6.3 credit follows. Literal book/Hub metadata is navigation only: Book2 Handling Data4 F6.1Aii is a modular subpart; Book1 Handling Data3 map398 starts differently from proof397 and Book2 Handling Data6 map208 from proof207. Relevant chapter/Hub bodies remain unavailable. Statistical measures6.2 adds eight original lessons: four shared Foundation list/frequency averages, simple mean problems and grouped midpoint estimates/modal classes; four additional Higher spread, discrete quartiles, median and IQR from cumulative diagrams. Every source-bound record needs substantive teaching, its explained worked example and all three unique practice stages. Preserve repeated positions, weighted counts, observed zero-frequency extremes, compatible units, grouped estimation limits, the explicitly chosen median-of-halves convention, actual graph guides, each curve’s own total and nonunique plateau intervals. Literal Book2 Handling Data4/5/6 tags and Hubs are navigation metadata only; no Book1 tag, complete chapter body or Hub access is inferred. Handling Data6 map208–222 versus proof207/summary221/next222 stays explicit. Statistical measures alone does not replace Probability6.3 teaching. Probability6.3 adds nine original lessons for ten shared F6.3A–J and four additional H6.3A–D rows. The first five are shared language/scales/models, complete single/two-event sample spaces, Venn probabilities, experimental estimates/expected frequencies and complement/mutually-exclusive addition; the final four are Higher independent trees, actual without-replacement trees, simple conditioning and contextual inverse/mixed models. Each required source-bound strand needs substantive teaching, an explained worked example and exactly one complete Guided/Independent/Transfer task in the same actual record. F6.3C requires both model and sample-space slices; H6.3A requires independent, dependent and application trees; H6.3B requires independent and application slices; H6.3C requires without-replacement, simple-conditioning and application slices; H6.3D requires conditioning and application slices. Retain physical identities, nonuniform weights, original ordered histories, complete branches/terminal events, unchanged versus changing contents, restricted positive conditional denominators and undefined empty conditioning. Experimental variability and fractional expected counts are model predictions rather than guaranteed observations. Inverse physical counts keep original nonnegative integer/positive-total domains. Chosen three-set, three-stage and inverse safeguards do not add source rows or a named general conditional theorem. Literal Book1 HandlingData1/2/3 tags and Hubs are navigation only; no Book2 tag or unseen probability chapter/Hub body is invented. Preserve map228–242/proof229–243/next244, map303/proof304–328/next329 and map398–428/proof397/summary426/next428; missing explicit Hub A/B/F/J tags remain absent. The common two-coin elementary model is not claimed as novel. All39 source sections and242 requirements now have structural teaching/practice links; that is not exhaustive subskill, teacher, full-book, mastery, specialist or formal-assessment approval. The independent source inventory contains 162 Foundation requirements and 80 additional Higher requirements; some lettered requirements contain multiple skills. A lesson link alone does not verify every skill or examination readiness. Written practice is self-checked, not automatically marked. Specialist approval and cumulative assessment have not been established. This course follows the linked Issue 2 linear 4MA1 specification. The 2026/2027 entry manual lists F/H in November 2026 and June 2027; regional FR/HR entries are June 2027 only and depend on centre eligibility. Modular 4XMAF and 4XMAH coverage is separate.

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