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.
How many different ways can you find of fitting five hexagons together? How will you know you have found all the ways?
What is the total area of the four outside triangles which are outlined in red in this arrangement of squares inside each other?
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.
Can you picture where this letter "F" will be on the grid if you flip it in these different ways?
Can you work out what kind of rotation produced this pattern of pegs in our pegboard?
Billy's class had a robot called Fred who could draw with chalk held underneath him. What shapes did the pupils make Fred draw?
How many different symmetrical shapes can you make by shading triangles or squares?
Generate three random numbers to determine the side lengths of a triangle. What triangles can you draw?
What is the relationship between these first two shapes? Which shape relates to the third one in the same way? Can you explain why?
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.
Why do you think that the red player chose that particular dot in this game of Seeing Squares?
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?
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?
Draw some isosceles triangles with an area of $9$cm$^2$ and a vertex at (20,20). If all the vertices must have whole number coordinates, how many is it possible to draw?
Can you cut a regular hexagon into two pieces to make a parallelogram? Try cutting it into three pieces to make a rhombus!
These points all mark the vertices (corners) of ten hidden squares. Can you find the 10 hidden squares?
A group activity using visualisation of squares and triangles.
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 work out what shape is made by folding in this way? Why not create some patterns using this shape but in different sizes?
Choose a box and work out the smallest rectangle of paper needed to wrap it so that it is completely covered.
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.
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?
Make a flower design using the same shape made out of different sizes of paper.
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?
How many DIFFERENT quadrilaterals can be made by joining the dots on the 8-point circle?
The diagram shows a very heavy kitchen cabinet. It cannot be lifted but it can be pivoted around a corner. The task is to move it, without sliding, in a series of turns about the corners so that it. . . .
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?
Can you visualise what shape this piece of paper will make when it is folded?
In how many ways can you fit all three pieces together to make shapes with line symmetry?
Where can you put the mirror across the square so that you can still "see" the whole square? How many different positions are possible?
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.
Can you find a way of counting the spheres in these arrangements?
Can you work out what is wrong with the cogs on a UK 2 pound coin?
Imagine a wheel with different markings painted on it at regular intervals. Can you predict the colour of the 18th mark? The 100th mark?
Can you recreate these designs? What are the basic units? What movement is required between each unit? Some elegant use of procedures will help - variables not essential.
This problem invites you to build 3D shapes using two different triangles. Can you make the shapes from the pictures?
This article for teachers describes a project which explores the power of storytelling to convey concepts and ideas to children.
See if you can anticipate successive 'generations' of the two animals shown here.
Can you fit the tangram pieces into the outlines of the convex shapes?
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 see why 2 by 2 could be 5? Can you predict what 2 by 10 will be?
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.
Imagine an infinitely large sheet of square dotty paper on which you can draw triangles of any size you wish (providing each vertex is on a dot). What areas is it/is it not possible to draw?
A train leaves on time. After it has gone 8 miles (at 33mph) the driver looks at his watch and sees that the hour hand is exactly over the minute hand. When did the train leave the station?
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 use small coloured cubes to make a 3 by 3 by 3 cube so that each face of the bigger cube contains one of each colour?
Seven small rectangular pictures have one inch wide frames. The frames are removed and the pictures are fitted together like a jigsaw to make a rectangle of length 12 inches. Find the dimensions of. . . .
ABCDEFGH is a 3 by 3 by 3 cube. Point P is 1/3 along AB (that is AP : PB = 1 : 2), point Q is 1/3 along GH and point R is 1/3 along ED. What is the area of the triangle PQR?