Perimeter of rectilinear shapes
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.
1+2+4+1+5+3=16
The perimeter of the shape is 16metres. (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.
7+2+4+3+3+5=24
The perimeter of the shape is 24metres. (Metres can be written “m”.)
➡️ What is the perimeter of the shape?
_____ centimetres
To find the perimeter, find the total length of the shape’s sides.
Add all of the side lengths.
2+2+4+1+2+1=12
The perimeter of the shape is 12centimetres. (Centimetres can be written “cm”.)
let’s practice!
