Pythagoras Theorem

Pythagoras' theorem is a theorem concerning the three sides of a right triangle, that states that:

The square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.

A right triangle has 3 sides. If we label the length of each side a, b and c, Pythagoras' theorem can be written as a formula:

This widget allows you to find the lengths of the sides of a right triangle.

Learn About Pythagoras' Theorem

Draw a right triangle by:

  • Clicking on the canvas, or
  • Entering two sides lengths.

Sides of the Right Triangle