These guys are 2D shapes and 2D shapes are everywhere. Shapes have sides and corners and are completely flat, like a drawing on a piece of paper. Circles don’t have corners and have got just one ...

The perimeter is the total distance around the edge of a 2D shape. Examples of units of distance are millimetres (mm), centimetres (cm) and metres (m). The perimeter of any 2D shape can be found ...