### Overlapping Circles

What shaped overlaps can you make with two circles which are the same size? What shapes are 'left over'? What shapes can you make when the circles are different sizes?

### Pi, a Very Special Number

Read all about the number pi and the mathematicians who have tried to find out its value as accurately as possible.

### Circles, Circles Everywhere

This article for pupils gives some examples of how circles have featured in people's lives for centuries.

# Yin Yang

## Yin Yang

Using just a pair of compasses, a ruler and a pencil, recreate this Yin Yang symbol:

(You might like to use a black crayon or felt-tipped pen too!)

How would you explain to someone else what to do?

### Why do this problem?

This challenge not only enables pupils to practise using a pair of compasses and measuring accurately, but it also provides a very good opportunity for discussing properties of shapes.

### Possible approach

To begin with, it might be appropriate to display the image to the whole class and invite them to describe what they see. Children could share their own method for drawing the symbol with a partner and the two could decide which of their ways might be more efficient and why.