Teachers, save “Numeracy - Perimeter” to assign it to your class.

Perimeter is the distance all the way around the outside of a 2D shape. To calculate the perimeter, you have to add together the lengths of each side of the shape. Listen to my examples. <-------------------------- Click here to watch my instructions to see how to work out perimeter. Then click on to open the slides and have a go calculating the perimeter of the 2D shapes.