Billy's class had a robot called Fred who could draw with chalk held underneath him. What shapes did the pupils make Fred draw?
This practical problem challenges you to make quadrilaterals with a loop of string. You'll need some friends to help!
Draw three straight lines to separate these shapes into four groups - each group must contain one of each shape.
Can you cut a regular hexagon into two pieces to make a parallelogram? Try cutting it into three pieces to make a rhombus!
What shape has Harry drawn on this clock face? Can you find its area? What is the largest number of square tiles that could cover this area?
What is the total area of the four outside triangles which are outlined in red in this arrangement of squares inside each other?
What is the relationship between these first two shapes? Which shape relates to the third one in the same way? Can you explain why?
What is the greatest number of squares you can make by overlapping three squares?
A shape and space game for 2,3 or 4 players. Be the last person to be able to place a pentomino piece on the playing board. Play with card, or on the computer.
How many different ways can you find of fitting five hexagons together? How will you know you have found all the ways?
Seeing Squares game for an adult and child. Can you come up with a way of always winning this game?
Paint a stripe on a cardboard roll. Can you predict what will happen when it is rolled across a sheet of paper?
The triangle ABC is equilateral. The arc AB has centre C, the arc BC has centre A and the arc CA has centre B. Explain how and why this shape can roll along between two parallel tracks.
Why do you think that the red player chose that particular dot in this game of Seeing Squares?
Can you work out what kind of rotation produced this pattern of pegs in our pegboard?
How many different symmetrical shapes can you make by shading triangles or squares?
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.
Have a look at what happens when you pull a reef knot and a granny knot tight. Which do you think is best for securing things together? Why?
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?
Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.
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?
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 visualise what shape this piece of paper will make when it is folded?
A triangle ABC resting on a horizontal line is "rolled" along the line. Describe the paths of each of the vertices and the relationships between them and the original triangle.
A group activity using visualisation of squares and triangles.
Can you picture where this letter "F" will be on the grid if you flip it in these different ways?
Where can you put the mirror across the square so that you can still "see" the whole square? How many different positions are possible?
In how many ways can you fit all three pieces together to make shapes with line symmetry?
Charlie and Alison have been drawing patterns on coordinate grids. Can you picture where the patterns lead?
This article looks at levels of geometric thinking and the types of activities required to develop this thinking.
These points all mark the vertices (corners) of ten hidden squares. Can you find the 10 hidden squares?
A tilted square is a square with no horizontal sides. Can you devise a general instruction for the construction of a square when you are given just one of its sides?
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!
Slide the pieces to move Khun Phaen past all the guards into the position on the right from which he can escape to freedom.
ABCD is a regular tetrahedron and the points P, Q, R and S are the midpoints of the edges AB, BD, CD and CA. Prove that PQRS is a square.
These are pictures of the sea defences at New Brighton. Can you work out what a basic shape might be in both images of the sea wall and work out a way they might fit together?
Start with a large square, join the midpoints of its sides, you'll see four right angled triangles. Remove these triangles, a second square is left. Repeat the operation. What happens?
On which of these shapes can you trace a path along all of its edges, without going over any edge twice?
The whole set of tiles is used to make a square. This has a green and blue border. There are no green or blue tiles anywhere in the square except on this border. How many tiles are there in the set?
How many DIFFERENT quadrilaterals can be made by joining the dots on the 8-point circle?
Mathematics is the study of patterns. Studying pattern is an opportunity to observe, hypothesise, experiment, discover and create.
Imagine a 3 by 3 by 3 cube made of 9 small cubes. Each face of the large cube is painted a different colour. How many small cubes will have two painted faces? Where are they?
A game for 2 players. Given a board of dots in a grid pattern, players take turns drawing a line by connecting 2 adjacent dots. Your goal is to complete more squares than your opponent.
Make a cube out of straws and have a go at this practical challenge.
You have been given three shapes made out of sponge: a sphere, a cylinder and a cone. Your challenge is to find out how to cut them to make different shapes for printing.
An extension of noughts and crosses in which the grid is enlarged and the length of the winning line can to altered to 3, 4 or 5.
Can you arrange the shapes in a chain so that each one shares a face (or faces) that are the same shape as the one that follows it?
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?
Investigate how the four L-shapes fit together to make an enlarged L-shape. You could explore this idea with other shapes too.
Which of these dice are right-handed and which are left-handed?