Pythagoras' Theorem

Learn About Pythagoras' Theorem

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

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. Draw a right triangle by:

a:

b:

c:

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