Perimeter

#### Perimeter and Circumference

The distance around a shape is called its perimeter.

The perimeter of a circle is its circumference.

## How to get the Perimeter of plain shapes

#### 4. Semi circle

• To find the perimeter of a plain shape like a rectangle, use the formula 2(L + W)
• To find the perimeter of a square use 4 X L
• To get the circumference of a full circle use πd
• To get the distance all round a half a circle, get the circumference of the half circle and the diameter. Use the formula πd + d
• To get the distance all round a figure made up of various shapes then add up the measurements.

### Sources

• M4.2.1_perimeter by Unknown used under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
• a3d0576b-2057-4473-9880-b5e1b801ed36 by elimu used under CC_BY-SA

elimu

used under CC_BY-SA
• perimeter_img1 by

elimu

used under CC_BY-SA
• perimeter_img2 by elimu used under CC_BY-SA
• perimeter_img3 by elimu used under CC_BY-SA
• 77c2ffa1-431a-4e82-b1b8-abf92181733d by elimu used under CC_BY-SA
• 4a1ded46-4d01-4332-849c-85eab2ad2bbc by elimu used under CC_BY-SA