You may also like

problem icon


There are to be 6 homes built on a new development site. They could be semi-detached, detached or terraced houses. How many different combinations of these can you find?

problem icon

Let's Investigate Triangles

Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?

problem icon

Teddy Town

There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?

Triangle Edges

Stage: 1 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

How many triangles can you make using sticks that are 3cm, 4cm and 5cm long?
Each side can only use one stick but a triangle can use more than one stick of the same length.

You could use the interactivity below to investigate the problem and try making some triangles.

You need to choose three sticks by clicking on the red, green or blue buttons.
You can then rotate each stick (turn it round) by clicking and dragging on its end.
If you click and drag near the middle of a stick, you can move it.

This text is usually replaced by the Flash movie.