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?
This practical activity challenges you to create symmetrical designs by cutting a square into strips.
Can you recreate this Indian screen pattern? Can you make up similar patterns of your own?
We can cut a small triangle off the corner of a square and then fit the two pieces together. Can you work out how these shapes are made from the two pieces?
Using a loop of string stretched around three of your fingers, what different triangles can you make? Draw them and sort them into groups.
Follow these instructions to make a five-pointed snowflake from a square of paper.
Have a go at making a few of these shapes from paper in different sizes. What patterns can you create?
Have you ever tried tessellating capital letters? Have a look at these examples and then try some for yourself.
Try continuing these patterns made from triangles. Can you create your own repeating pattern?
It's hard to make a snowflake with six perfect lines of symmetry, but it's fun to try!
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?
Explore the triangles that can be made with seven sticks of the same length.
Watch this "Notes on a Triangle" film. Can you recreate parts of the film using cut-out triangles?
Can you make a rectangle with just 2 dominoes? What about 3, 4, 5, 6, 7...?
In this activity focusing on capacity, you will need a collection of different jars and bottles.
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.
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 describe a piece of paper clearly enough for your partner to know which piece it is?
What shapes can you make by folding an A4 piece of paper?
A brief video looking at how you can sometimes use symmetry to distinguish knots. Can you use this idea to investigate the differences between the granny knot and the reef knot?
You'll need a collection of cups for this activity.
For this activity which explores capacity, you will need to collect some bottles and jars.
Make a chair and table out of interlocking cubes, making sure that the chair fits under the table!
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 make the birds from the egg tangram?
Ideas for practical ways of representing data such as Venn and Carroll diagrams.
Where can you put the mirror across the square so that you can still "see" the whole square? How many different positions are possible?
Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.
Here's a simple way to make a Tangram without any measuring or ruling lines.
Follow the diagrams to make this patchwork piece, based on an octagon in a square.
Can you make the most extraordinary, the most amazing, the most unusual patterns/designs from these triangles which are made in a special way?
NRICH December 2006 advent calendar - a new tangram for each day in the run-up to Christmas.
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?
Can you fit the tangram pieces into the outline of this junk?
Can you fit the tangram pieces into the outlines of these people?
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 outline of the child walking home from school?
Can you fit the tangram pieces into the outlines of the lobster, yacht and cyclist?
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 Little Ming playing the board game?
Use the three triangles to fill these outline shapes. Perhaps you can create some of your own shapes for a friend to fill?
This practical problem challenges you to create shapes and patterns with two different types of triangle. You could even try overlapping them.
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?
Have a go at drawing these stars which use six points drawn around a circle. Perhaps you can create your own designs?
Can you fit the tangram pieces into the outline of this telephone?
Looking at the picture of this Jomista Mat, can you decribe what you see? Why not try and make one yourself?
Make a flower design using the same shape made out of different sizes of paper.
This is a simple paper-folding activity that gives an intriguing result which you can then investigate further.
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?