This only works for right angled triangles!Examiners love to give you “distance between two points” questions that involve this theorem.

**Example**: Find the distance between points (1,-4) and (6,3) on the graph.*If given a question like this simply draw a right angled triangle matching up the two points and find the length of the two shorter sides. *So here the shorter sides are 7 and 5.

72 + 52 = 49 + 25 = 74

So the distance between the points = √ 74 = 8.602 (3 d.p.).