Maths Without Limits
Opening Young Minds to Endless Possibilities

How many different kinds of triangle are there? Can you have a triangle with two obtuse angles?

These and other questions are all explored in this practical investigation using geostrips (or something similar).

By the end of the investigation you should be able to identify right-angled, acute-angled and obtuse-angled triangles and know what it means for a triangle to be equilateral, isoceles or scalene.