Chapter 7

Three-Dimensional Shapes

Meet solid 3D shapes like the cube, cylinder, cone and sphere.

3D shapes around us

3D shapes are solid shapes you can hold. Here are some you know.

  • Cube – like a dice.
  • Cuboid – like a shoe box.
  • Cylinder – like a drink can.
  • Cone – like an ice-cream cone.
  • Sphere – like a ball.

Key idea

Round shapes like a sphere can roll. Shapes with flat faces, like a cube, can stack.

Counting faces

Worked example

A cube is like a dice. Count its flat faces: it has 6 flat faces.

Remember

  • A sphere can roll.
  • A cube has 6 flat faces.
  • A cone has one point at the top.

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