Perimeter, Area, Volume Perimeter Learn about perimeters and how to calculate the perimeter of a simple shape with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Why is the area of a circle proportional to the square of its radius? And why is that ratio the same as the ratio of the circumference to the diameter?

Area and perimeter are explained in the context of a Grecian pizza parlour. How many plates can be arranged around the perimeter of the room? How many are needed for guests to smash? Suitable for ...