17.1 Properties of 2D and 3D shapes — Practise with help
Attempt each item before opening its help. Recall ideas from earlier chapters first.
Warm-up: remember
Answer these from memory. Do not look back at the section.
- How many faces and vertices does a cuboid have?
- How many sides does a hexagon have?
Check the warm-up
- 6 faces and 8 vertices.
- 6 sides.
If an answer differs, sketch the shape and count its faces, vertices and sides again.
Try these with help
1. A triangular prism has two triangular ends. Name its other faces.
Hint
A prism has one rectangular face for each side of its end shape.
Next step
The triangular end has three sides.
Full answer
It has three rectangular faces.
2. A cube has square faces. State its number of edges and vertices.
Hint
Count the joins and corners.
Next step
A cube has 12 edges and 8 vertices.
Full answer
12 edges and 8 vertices.