Read all about the number pi and the mathematicians who have tried to find out its value as accurately as possible.
This article for pupils gives some examples of how circles have featured in people's lives for centuries.
Can you reproduce the Yin Yang symbol using a pair of compasses?
Using circles cut from tissue paper will make the overlap easy
They also look good displayed on the window against the light
because the overlap comes out a different colour.
Asking pupils to move the circles over one another gradually
will help them to see the possibilities clearly.
As names of shapes are not required, this activity provides a
chance to encourage careful description using appropriate
This is a good opportunity to talk about the symmetry of circles