Use the form below to calculate the value for the hypotenuse of a right triangle.
The Pythagorean Theorem states that the square of the length of the hypotenuse (the longest of the 3 sides, the one that does not touch the 90˚ angle) of a right triangle (any triangle that has one angle that is equal to 90˚) equals the sum of the squares of the other 2 sides (the short sides, the ones that do touch the 90˚ angle).
In other words: a2 + b2 = c2