Can you work out what shape is made by folding in this way? Why not create some patterns using this shape but in different sizes?
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?
Draw three straight lines to separate these shapes into four groups - each group must contain one of each shape.
What is the total area of the four outside triangles which are outlined in red in this arrangement of squares inside each other?
A group activity using visualisation of squares and triangles.
Make a flower design using the same shape made out of different sizes of paper.
10 space travellers are waiting to board their spaceships. There are two rows of seats in the waiting room. Using the rules, where are they all sitting? Can you find all the possible ways?
Can you fit the tangram pieces into the outlines of the workmen?
Here's a simple way to make a Tangram without any measuring or ruling lines.
How will you go about finding all the jigsaw pieces that have one peg and one hole?
Swap the stars with the moons, using only knights' moves (as on a chess board). What is the smallest number of moves possible?
Can you fit the tangram pieces into the outlines of the chairs?
Can you fit the tangram pieces into the outline of Little Ming and Little Fung dancing?
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 this goat and giraffe?
Can you fit the tangram pieces into the outline of this sports car?
Design an arrangement of display boards in the school hall which fits the requirements of different people.
Seeing Squares game for an adult and child. Can you come up with a way of always winning this game?
Find a way to cut a 4 by 4 square into only two pieces, then rejoin the two pieces to make an L shape 6 units high.
Can you shunt the trucks so that the Cattle truck and the Sheep truck change places and the Engine is back on the main line?
This article looks at levels of geometric thinking and the types of activities required to develop this thinking.
What is the best way to shunt these carriages so that each train can continue its journey?
Can you fit the tangram pieces into the outline of this shape. How would you describe it?
Here are some arrangements of circles. How many circles would I need to make the next size up for each? Can you create your own arrangement and investigate the number of circles it needs?
Can you cut up a square in the way shown and make the pieces into a triangle?
A game has a special dice with a colour spot on each face. These three pictures show different views of the same dice. What colour is opposite blue?
Can you use the interactive to complete the tangrams in the shape of butterflies?
How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!
Can you fit the tangram pieces into the silhouette of the junk?
Looking at the picture of this Jomista Mat, can you decribe what you see? Why not try and make one yourself?
Investigate the number of paths you can take from one vertex to another in these 3D shapes. Is it possible to take an odd number and an even number of paths to the same vertex?
Can you cut a regular hexagon into two pieces to make a parallelogram? Try cutting it into three pieces to make a rhombus!
Investigate how the four L-shapes fit together to make an enlarged L-shape. You could explore this idea with other shapes too.
Can you fit the tangram pieces into the outlines of Mai Ling and Chi Wing?
Can you fit the tangram pieces into the outlines of the candle and sundial?
This task, written for the National Young Mathematicians' Award 2016, involves open-topped boxes made with interlocking cubes. Explore the number of units of paint that are needed to cover the boxes. . . .
Can you fit the tangram pieces into the outline of Mai Ling?
Can you fit the tangram pieces into the outlines of the watering can and man in a boat?
This challenge involves eight three-cube models made from interlocking cubes. Investigate different ways of putting the models together then compare your constructions.
What is the greatest number of squares you can make by overlapping three squares?
Billy's class had a robot called Fred who could draw with chalk held underneath him. What shapes did the pupils make Fred draw?
Can you fit the tangram pieces into the outline of these convex shapes?
How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?
Can you fit the tangram pieces into the outline of Little Ming playing the board game?
Paint a stripe on a cardboard roll. Can you predict what will happen when it is rolled across a sheet of paper?
Imagine a 4 by 4 by 4 cube. If you and a friend drill holes in some of the small cubes in the ways described, how many will not have holes drilled through them?
For this task, you'll need an A4 sheet and two A5 transparent sheets. Decide on a way of arranging the A5 sheets on top of the A4 sheet and explore ...
What are the next three numbers in this sequence? Can you explain why are they called pyramid numbers?
Can you visualise what shape this piece of paper will make when it is folded?
Can you find ways of joining cubes together so that 28 faces are visible?