2D shapes and their properties

There are 152 NRICH Mathematical resources connected to 2D shapes and their properties
Hexapentagon
problem

Hexapentagon

Age
11 to 14
Challenge level
filled star filled star empty star
Weekly Problem 53 - 2007
The diagram shows a regular pentagon and regular hexagon which overlap. What is the value of x?
Regular Rings 2
problem

Regular rings 2

Age
7 to 11
Challenge level
filled star filled star empty star
What shape is made when you fold using this crease pattern? Can you make a ring design?
Introducing NRICH TWILGO
interactivity

Introducing nrich twilgo

We're excited about this new program for drawing beautiful mathematical designs. Can you work out how we made our first few pictures and, even better, share your most elegant solutions with us?
Arclets Explained
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.
Pi, a Very Special Number
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.
From One Shape to Another
article

From one shape to another

Read about David Hilbert who proved that any polygon could be cut up into a certain number of pieces that could be put back together to form any other polygon of equal area.
Circles, circles everywhere
article

Circles, circles everywhere

This article for pupils gives some examples of how circles have featured in people's lives for centuries.
What's Inside/Outside/Under the Box?
article

What's inside/outside/under the box?

This article describes investigations that offer opportunities for children to think differently, and pose their own questions, about shapes.