Regular polygons and circles

This article is about triangles in which the lengths of the sides and the radii of the inscribed circles are all whole numbers.

This article gives an wonderful insight into students working on the Arclets problem that first appeared in the Sept 2002 edition of the NRICH website.

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.