Pythagorean theorem (Pythagoras' theorem)

The Pythagorean theorem or Pythagoras' theorem is a relation in Euclidean geometry among the three sides of a right triangle.

"The square of the hypotenuse is equal to the sum of the squares of the other two sides."


This theorem, applied in a right triangle, calculates one of the lengths according to the others. This theorem has the name of a mathematician and philosopher of ancient Greece, Pythagoras of Samos, even if the result was independently discovered in several other cultures long before.

Pythagorean Formula : Scientific Formula

In a right triangle, with the hypotenuse in C, we have:

C² = A² + B²

Pythagorean calculator

Calculate the side of a right triangle from two known values :

A = B = C =

Remarks :
Enter the two known values ​​to know the third one.