The perimeter is the total distance around the edge of a 2D shape. Since it is a length, the metric units for perimeter are millimetres (mm), centimetres (cm), metres (m) and kilometres (km).

KAYLA: What’s perimeter? ADA: Perimeter is the length of the lines around the closed 2D shape.If we look at this window here; the area is the glass bit in the middle and the perimeter is the ...

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. Area of squares, rectangles and ...