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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.

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Circles, Circles Everywhere

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

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Yin Yang

Can you reproduce the Yin Yang symbol using a pair of compasses?

Overlapping Circles

Stage: 2 Challenge Level: Challenge Level:1

Can you describe the sides of the shapes you can make?

Do you notice anything about all the shapes you make using two circles the same size?

When the two circles are different sizes, what else is possible?

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
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NRICH is part of the family of activities in the Millennium Mathematics Project.