Perimeter of polygons
key notes:
The perimeter of a shape is the distance around the shape. It is the total length of the shape’s sides.
Learn with an example
➡️ What is the perimeter of the shape?
______metres
To find the perimeter, find the total length of the shape’s sides.
Add all of the side lengths.
3+5+4=12
The perimeter of the shape is 12 metres. (Metres can be written “m”.)
➡️ What is the perimeter of the shape?
_____ metres
To find the perimeter, find the total length of the shape’s sides.
Add all of the side lengths.
1+1+2+1=5
The perimeter of the shape is 5 metres. (Metres can be written “m”.)
➡️ What is the perimeter of the shape?
____ metres
To find the perimeter, find the total length of the shape’s sides.
Add all of the side lengths.
3+1+3+1=8
The perimeter of the shape is 8 metres. (Metres can be written “m”.)
let’s practice!
