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

1. Rectangle

 

2. Square

3. Full circle

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.

 



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