Topic summary · Foundation · CIE Core
3D Shapes summary
3D shape work names solids, counts faces/edges/vertices, and uses nets. Euler’s relation is a useful check for convex polyhedra.
Files: foundation-24 3D Shapes handout.pdf · foundation-24 3D Shapes answers.pdf · free public downloads · diagrams in the PDFs
Key learning points
- Prisms have a constant cross-section; pyramids taper to an apex.
- Nets must fold without overlapping faces.
- Plans and elevations are orthographic 2D views.
Worked example 1 — Euler check
Cube , , . Euler?
Working
Convex polyhedra.
Worked example 2 — Faces
Triangular prism: number of faces?
Working
2 triangles + 3 rectangles.
Worked example 3 — Net
Can six squares form a cube net?
Working
No more than four in a row.
Scaffolded Learning Sheet and answers (PDFs)
This page is a short, searchable overview for revision and search engines. Use the Scaffolded Learning Sheet first, then the Answers PDF for a full written solution. The printable PDFs remain the main classroom resource.