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
article
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.
article
Arclets 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.
article
Incircles Explained
This article is about triangles in which the lengths of the sides and the radii of the inscribed circles are all whole numbers.
interactivity
Tessellation interactivity
An environment that enables you to investigate tessellations of
regular polygons
problem
Shogi shapes
Age
11 to 14
Challenge level
Shogi tiles can form interesting shapes and patterns... I wonder whether they fit together to make a ring?
problem
Always, Sometimes or Never? Shape
Age
7 to 11
Challenge level
Are these statements always true, sometimes true or never true?
problem
Gibraltar Geometry
Age
11 to 14
Challenge level
Take a look at the photos of tiles at a school in Gibraltar. What questions can you ask about them?