Be careful to measure accurately when you are drawing a 2D shape. Draw a 2D shape that has 4 equal sides that are each 3 cm long and has 4 right angles. What is this shape called? It is a square.

The simplest way to work out the perimeter of a 2D shape, is to add the length of all the sides together. A rectangle has two long sides and two short sides. The longest side of this rectangle is ...