### 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.

# Circle Panes

##### Stage: 2 Challenge Level:

Look carefully, what shapes can you see?

How many of each coloured pane are there? Are you sure?

What would be a good word to describe the shape of the coloured panes of glass?

How big do you think this window is? Guess.
In how many different ways could you make a sensible estimate of its size? Talk about the different options with someone else.

Do you think it would be easy to make a window in this way? Why or why not?

Use whatever you like to make a drawing similar to what you see in the picture.

Research rose windows on the internet. Why were they so popular in churches and cathedrals?