2-dimensional shapes are flat. The perimeter of a 2D shape is the total distance around the outside of the shape. ... A compound shape is made up of several simple 2D shapes.

The outside edge of a shape is known as the perimeter. Learn how to work out the perimeter of a 2D shape with this Year 4 article from BBC Bitesize.

A KS2/2nd Level maths lesson exploring area and perimeter, symmetry and coordinates, live from Manchester City FC.