Explore the triangles that can be made with seven sticks of the
Try continuing these patterns made from triangles. Can you create
your own repeating pattern?
In this challenge, you will work in a group to investigate circular
fences enclosing trees that are planted in square or triangular
Can you see which tile is the odd one out in this design? Using the
basic tile, can you make a repeating pattern to decorate our wall?
What happens to the area of a square if you double the length of
the sides? Try the same thing with rectangles, diamonds and other
shapes. How do the four smaller ones fit into the larger one?
Can you make the most extraordinary, the most amazing, the most
unusual patterns/designs from these triangles which are made in a
We went to the cinema and decided to buy some bags of popcorn so we
asked about the prices. Investigate how much popcorn each bag holds
so find out which we might have bought.
What is the largest number of circles we can fit into the frame
without them overlapping? How do you know? What will happen if you
try the other shapes?
If you split the square into these two pieces, it is possible to fit the pieces together again to make a new shape. How many new shapes can you make?
This practical investigation invites you to make tessellating
shapes in a similar way to the artist Escher.
How many different cuboids can you make when you use four CDs or
DVDs? How about using five, then six?
These pictures show squares split into halves. Can you find other ways?
Make a chair and table out of interlocking cubes, making sure that the chair fits under the table!
Have a go at making a few of these shapes from paper in different sizes. What patterns can you create?
Using different numbers of sticks, how many different triangles are
you able to make? Can you make any rules about the numbers of
sticks that make the most triangles?
This was a problem for our birthday website. Can you use four of these pieces to form a square? How about making a square with all five pieces?
Take a rectangle of paper and fold it in half, and half again, to
make four smaller rectangles. How many different ways can you fold
Our 2008 Advent Calendar has a 'Making Maths' activity for every
day in the run-up to Christmas.
Have you noticed that triangles are used in manmade structures?
Perhaps there is a good reason for this? 'Test a Triangle' and see
how rigid triangles are.
We have a box of cubes, triangular prisms, cones, cuboids,
cylinders and tetrahedrons. Which of the buildings would fall down
if we tried to make them?
In this activity focusing on capacity, you will need a collection of different jars and bottles.
For this activity which explores capacity, you will need to collect some bottles and jars.
You'll need a collection of cups for this activity.
Use the three triangles to fill these outline shapes. Perhaps you can create some of your own shapes for a friend to fill?
What shapes can you make by folding an A4 piece of paper?
Is there a best way to stack cans? What do different supermarkets
do? How high can you safely stack the cans?
Can you describe a piece of paper clearly enough for your partner to know which piece it is?
You will need a long strip of paper for this task. Cut it into different lengths. How could you find out how long each piece is?
Move four sticks so there are exactly four triangles.
Here is a version of the game 'Happy Families' for you to make and
NRICH December 2006 advent calendar - a new tangram for each day in
the run-up to Christmas.
In how many ways can you fit two of these yellow triangles
together? Can you predict the number of ways two blue triangles can
be fitted together?
Can you create more models that follow these rules?
Can you make a rectangle with just 2 dominoes? What about 3, 4, 5,
Using a loop of string stretched around three of your fingers, what
different triangles can you make? Draw them and sort them into
A group of children are discussing the height of a tall tree. How would you go about finding out its height?
Can you make the birds from the egg tangram?
Follow the diagrams to make this patchwork piece, based on an
octagon in a square.
Kaia is sure that her father has worn a particular tie twice a week
in at least five of the last ten weeks, but her father disagrees.
Who do you think is right?
Here's a simple way to make a Tangram without any measuring or
Can you fit the tangram pieces into the outline of Wai Ping, Wah Ming and Chi Wing?
Can you fit the tangram pieces into the outline of Little Ming playing the board game?
Can you fit the tangram pieces into the outline of this telephone?
Can you fit the tangram pieces into the outline of Little Fung at the table?
Can you fit the tangram pieces into the outline of this brazier for roasting chestnuts?
Can you fit the tangram pieces into the outlines of these clocks?
Can you fit the tangram pieces into the outlines of these people?
Have a go at drawing these stars which use six points drawn around
a circle. Perhaps you can create your own designs?
Take 5 cubes of one colour and 2 of another colour. How many
different ways can you join them if the 5 must touch the table and
the 2 must not touch the table?
Watch this "Notes on a Triangle" film. Can you recreate parts of
the film using cut-out triangles?