The perimeter of a shape is the distance around the outside. It is a length so is measured in mm, cm, m, km or any other unit of length. 1. Calculate the lengths of the missing sides. The total ...

Ambrose: What's the perimeter? Pizza Boss: The perimeter is the outside of the shape, like the room. The area is the inside. Perimeter outside, area inside. Perimeter outside, area inside.