Congruent shapes and objects by matching
Identify congruent side lengths, angles and faces by matching them physically (tracing, overlaying, folding, comparing with a strip, fitting faces together) or mentally, within and between two-dimensional shapes and three-dimensional objects, and decide whether two shapes or two objects are congruent: the same size and the same shape, whatever their position or orientation (matching one face alone does not make two objects congruent)
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1 approach
Congruent shapes and objects by matching means practising the idea at the table with counters or paper models and one clear check. We will demo once, then your child tries.
Materials: Paper shapes or a ruler and pencil; Shape name cards. Adult traces or shows one shape and names a property (sides/angles). Child identifies three shapes or measures one simple property and records it. Done: three correct shape/property responses. Stop after the fresh check; keep optional challenge for another day.
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BBC Bitesize · Practice link — not the full lesson
KS3 Maths
Before you open · source notes
KS3 Maths supports Congruent shapes and objects by matching. An adult previews and guides; this is a learning page, not a scored quiz.
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Before you openAsk the learner one fact they learned and one question they still have.
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Public BBC Bitesize page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
BBC Bitesize. “KS3 Maths.” External page; Gakuva does not copy, host, embed, or redistribute materials.
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Check understanding
- Find the sides of equal length and the matching angles within a shape (e.g. a rectangle's opposite sides and four corners), and trace one shape onto another to decide whether every side and angle matches, explaining why a turned copy is congruent but a larger one is not
- Match the faces, edges and corner angles of two 3-D models (e.g. two boxes or two prisms) by tracing faces or fitting them together, and say which faces, edges and angles are congruent
- Decide whether two 3-D objects are congruent by checking that all corresponding faces match and are arranged the same way, explaining why two boxes with the same front face but different depths are not congruent
“If your child has two boxes or two paper shapes, can they match the sides, corners and faces to check whether they are exactly the same size and shape — and notice when two boxes look the same from the front but are not?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Geometry
- Age range
- Ages 7–11
Standards