Triangles

problem

Three Triangles

Age

7 to 11

Challenge level

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

Folding

Age

7 to 11

Challenge level

What shapes can you make by folding an A4 piece of paper?
problem

Diagrams

Age

7 to 11

Challenge level

A group activity using visualisation of squares and triangles.
problem

Inside Seven Squares

Age

7 to 11

Challenge level

What is the total area of the four outside triangles which are outlined in red in this arrangement of squares inside each other?
problem

Timber!

Age

7 to 11

Challenge level

How can the school caretaker be sure that the tree would miss the school buildings if it fell?
problem

Tessellating Transformations

Age

7 to 11

Challenge level

Can you find out how the 6-triangle shape is transformed in these tessellations? Will the tessellations go on for ever? Why or why not?
problem

Number the Sides

Age

7 to 11

Challenge level

The triangles in these sets are similar - can you work out the lengths of the sides which have question marks?