Triangles

problem
Favourite

Rectangle Tangle

Age

7 to 11

Challenge level

The large rectangle is divided into a series of smaller quadrilaterals and triangles. Can you untangle what fractional part is represented by each of the shapes?
problem
Favourite

Transformations on a Pegboard

Age

7 to 11

Challenge level

How would you move the bands on the pegboard to alter these shapes?
problem
Favourite

Nine-pin Triangles

Age

7 to 11

Challenge level

How many different triangles can you make on a circular pegboard that has nine pegs?
problem

Putting Two and Two Together

Age

7 to 11

Challenge level

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?
problem

Triangle Relations

Age

7 to 11

Challenge level

What do these two triangles have in common? How are they related?
problem

Three Triangles

Age

7 to 11

Challenge level

What do you notice when you put three triangles together?
problem
Favourite

Name That Triangle!

Age

7 to 11

Challenge level

Can you sketch triangles that fit in the cells in this grid? Which ones are impossible? How do you know?
problem

Possible Pairs

Age

7 to 11

Challenge level

In this game, you turn over two cards and try to draw a triangle which has both properties.
problem

Triangle in a Square

Age

7 to 11

Challenge level

Do you agree with Badger's statements? Is Badger's reasoning watertight? Why or why not?
problem

Regular Rings 1

Age

7 to 11

Challenge level

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?