Edges, vertices, and faces

MathematicsGeometryAges 6–7

Identify and describe properties of 3-D shapes including the number of edges, vertices, and faces

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Teaching Table

Set out your lesson

Distinguish and count faces, edges and vertices on a cube and triangular prism.

Activity

Track an object while turning it; tell a flat surface from a line and a point.

Policy

Directed source edges are preserved, not assumed completed. If the readiness probe is difficult, model with support and record supported practice instead of independent evidence.

Materials

Use the supplied stage-specific structured materials. Use polyhedra.svg and optional real box/triangular-prism model. Diagram has front and hidden edges; do not count dashed lines as extra edges.

Order

Show, guided, put teaching sheet aside, then task sheets in order; adult keys remain private.

Access

No printing or cutting is required unless explicitly choosing a physical construction. Exact paper alternatives are in each material; adaptations change the evidence mode as stated.

Materials are ready in each step. Use them on screen or print just the current step. Put teaching examples aside before the learner tries.

What this lesson covers and its limits

These are bounded opportunities, not learner attainment. Partial and blocked source requirements remain so.

partial: Identify and describe properties of 3-D shapes including the number of edges, vertices, and faces
Flat-faced cube/prism only; no ambiguous sphere/cone edge conventions. Text structural alternative changes evidence mode; image unrendered. This is a bounded task opportunity, not established attainment or automatic use across contexts.
partial: Count the edges, vertices, and faces of common 3-D shapes
Mapped task(s) offer this clause only within the supplied examples. Flat-faced cube/prism only; no ambiguous sphere/cone edge conventions. Text structural alternative changes evidence mode; image unrendered. No attainment or automatic/general performance is claimed.
partial: Use the terms edge, vertex (vertices), and face correctly
Mapped task(s) offer this clause only within the supplied examples. Flat-faced cube/prism only; no ambiguous sphere/cone edge conventions. Text structural alternative changes evidence mode; image unrendered. No attainment or automatic/general performance is claimed.
partial: Describe a 3-D shape by its properties (e.g. a cube has 6 faces, 12 edges, 8 vertices)
Mapped task(s) offer this clause only within the supplied examples. Flat-faced cube/prism only; no ambiguous sphere/cone edge conventions. Text structural alternative changes evidence mode; image unrendered. No attainment or automatic/general performance is claimed.
partial: Can {{name}} count the faces, edges, and vertices of a 3-D shape like a cube or triangular prism?
Flat-faced cube/prism only; no ambiguous sphere/cone edge conventions. Text structural alternative changes evidence mode; image unrendered. This is a bounded task opportunity, not established attainment or automatic use across contexts.

Flat-faced cube/prism only; no ambiguous sphere/cone edge conventions. Text structural alternative changes evidence mode; image unrendered.

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Distinguish and count faces, edges and vertices on a cube and triangular prism.

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Check understanding

Count the edges, vertices, and faces of common 3-D shapes
Use the terms edge, vertex (vertices), and face correctly
Describe a 3-D shape by its properties (e.g. a cube has 6 faces, 12 edges, 8 vertices)

“Can your child count the faces, edges, and vertices of a 3-D shape like a cube or triangular prism?”

Curriculum record

Type: Conceptual
Subject: Mathematics
Domain: Geometry
Age range: Ages 6–7

Standards

uk-nc-2013:Maths/Y2/GPS/2