article
Circles, circles everywhere
This article for pupils gives some examples of how circles have featured in people's lives for centuries.
Regular polygons and circles
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articlePi, 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. -
articleArclets explained
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. -
articleIncircles explained
This article is about triangles in which the lengths of the sides and the radii of the inscribed circles are all whole numbers. -
interactivityTessellation interactivity
Age7 to 16Challenge level
An environment that enables you to investigate tessellations of regular polygons -
problemShogi shapes
Age11 to 14Challenge level
Shogi tiles can form interesting shapes and patterns... I wonder whether they fit together to make a ring? -
problemAlways, sometimes or never? Shape
Age7 to 11Challenge level
Are these statements always true, sometimes true or never true?
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problemGibraltar geometry
Age11 to 14Challenge level
Take a look at the photos of tiles at a school in Gibraltar. What questions can you ask about them?