Pythagoras' theorem is a formula you can use to calculate the length of any of the sides on a right-angled triangle or the distance between two points.
You can also use Pythagoras' theorem to find the distance between two points:
Determining distance with Pythagoras' theorem
A is located at the point (2, 1). B is located at the point (5, 5).
A and B are connected
Triangle width and height are marked
Distance of AB is calculated