VO: The Ugly Sisters are giving their mouths a lot of exercise this morning in Panto House. They’re munching on piles of cakes, but it’s making them fat and spotty. They love eating cake whilst ...

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 by ...