Triangles

Try continuing these patterns made from triangles. Can you create your own repeating pattern?

This practical problem challenges you to create shapes and patterns with two different types of triangle. You could even try overlapping them.

Which of these triangular jigsaws are impossible to finish?

Can you describe what happens in this film?

A very mathematical light - what can you see?

If the yellow equilateral triangle is taken as the unit for area, what size is the hole ?

Can you make a regular hexagon from yellow triangles the same size as a regular hexagon made from green triangles ?

What does the overlap of these two shapes look like? Try picturing it in your head and then use some cut-out shapes to test your prediction.

How many different triangles can you draw on the dotty grid which each have one dot in the middle?

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