The perimeter is the total distance around the edge of a 2D shape. Examples of metric units of distance are millimetres (mm), centimetres (cm) and metres (m). The perimeter of any 2D shape can be ...

Find out about regular 2D shapes and irregular polygons. Types of triangle Find out about scalene, equilateral, isosceles and right-angled triangles. Parts of a circle Discover the features of a ...