The term circumference refers to the outside edge of a circle.

You can calculate the length of the circumference by multiplying the diameter (the length from one side to the other directly through the centre point of the circle) by the special maths number π (Pi – which is about 3.14).

 

If the diameter of a circle was 4cm, then the circumference is 3.14 x 4 which is  12.56cm.

 

The term “Circumference” would typically be introduced at Second Level but the need to be able to calculate the circumference using pi (π) would normally be taught at Third/Fourth level, beyond Primary School.

 

CURRICULUM LINK:

Having explored a range of
3D objects and 2D shapes,
I can use mathematical
language to describe their
properties, and through
investigation can discuss
where and why particular
shapes are used in the
environment.
MTH 2-16a