Trigonometry can be used to find the length of a side in a triangle. Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing side in a right-angled ...

How do you calculate that? Choose a line, any line. Since there are six lines, there are six choices. Next, choose a line to be the second side of the triangle.

Learn about and revise how Pythagoras’ theorem can be used to calculate the sides of right-angled triangles with GCSE Bitesize AQA Maths.