Some 3D shapes, like cubes and pyramids, can be opened or unfolded along their edges to create a flat shape.

The unfolded shape is called the net of the solid.

Here are some 3D shapes and their nets.

Net of a cube

3D shapes and their nets

Getting nets right

A net has to be able to fold up into the 3D shape. All of the following shapes are nets of a cube.

Net of a cuboid

Nets of a cube

Example 1 - net of a cube.

Getting nets wrong

The shapes below are not nets of cubes. Consider why they wouldn't fold up into a cube?

Untrue net of a cuboid

False nets

Example 1 – this is not a net of a cube.