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.
Calculate the perimeter of this triangle:
Add up the lengths of all the sides:
9 mm + 6.5 mm + 7 mm = 22.5 mm
Calculate the perimeter of this rectangle:
Calculate the perimeter of this L shape:
1. Calculate the lengths of the missing sides.
The total height of the shape is 10 m, subtracting 6 m leaves us with the length of the missing edge of 4 m.
The total width is missing – this has been split up into 3 m and 6 m. By adding them together we find the missing edge is 9 m.
2. Add all the lengths together:
3 m + 6 m + 6 m + 4 m + 9 m + 10 m = 38 m
Fencing is sold in 2 m panels for £30 each. How much would it cost to fence this field?