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?
Move four sticks so there are exactly four triangles.
These pictures show squares split into halves. Can you find other ways?
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?
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?
In this challenge, you will work in a group to investigate circular
fences enclosing trees that are planted in square or triangular
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?
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.
Use the three triangles to fill these outline shapes. Perhaps you can create some of your own shapes for a friend to fill?
Can you make the birds from the egg tangram?
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.
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?
This problem focuses on Dienes' Logiblocs. What is the same and
what is different about these pairs of shapes? Can you describe the
shapes in the picture?
How many different cuboids can you make when you use four CDs or
DVDs? How about using five, then six?
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?
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?
NRICH December 2006 advent calendar - a new tangram for each day in
the run-up to Christmas.
Can you make the most extraordinary, the most amazing, the most
unusual patterns/designs from these triangles which are made in a
Here is a version of the game 'Happy Families' for you to make and
This practical investigation invites you to make tessellating
shapes in a similar way to the artist Escher.
Make a chair and table out of interlocking cubes, making sure that the chair fits under the table!
For this activity which explores capacity, you will need to collect some bottles and jars.
Can you make a rectangle with just 2 dominoes? What about 3, 4, 5,
A group of children are discussing the height of a tall tree. How would you go about finding out its height?
Using a loop of string stretched around three of your fingers, what
different triangles can you make? Draw them and sort them into
In this activity focusing on capacity, you will need a collection of different jars and bottles.
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 make five differently sized squares from the tangram
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?
Can you create more models that follow these rules?
You'll need a collection of cups for this activity.
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?
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?
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.
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 this junk?
Can you recreate this Indian screen pattern? Can you make up
similar patterns of your own?
These practical challenges are all about making a 'tray' and covering it with paper.
Watch this "Notes on a Triangle" film. Can you recreate parts of
the film using cut-out triangles?
This practical activity challenges you to create symmetrical
designs by cutting a square into strips.
Looking at the picture of this Jomista Mat, can you decribe what
you see? Why not try and make one yourself?
This practical problem challenges you to create shapes and patterns
with two different types of triangle. You could even try
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?
How can you make a curve from straight strips of paper?
Can you fit the tangram pieces into the outlines of these people?
Can you fit the tangram pieces into the outlines of these clocks?
Can you fit the tangram pieces into the outline of the child walking home from school?