IGCSE Maths / Pythagoras theorem
Pythagoras on a coordinate grid
Edexcel International GCSE Maths (4MA1), chapter 15: Pythagoras theorem, specification point 4.8a-f. Part of the full course.
Read the revision notes · IGCSE Maths past papers
Find the straight-line distance between two points by using their horizontal and vertical gaps as the shorter sides of a right-angled triangle. Then apply Pythagoras’ theorem to find the sloping distance.