Does it work for non-right triangles?

No — use the law of cosines (see the Triangle Calculator) for other triangles.

Pythagorean Theorem Calculator

In a right triangle, the square of the hypotenuse equals the sum of the squares of the legs. Enter the two legs to find the hypotenuse with verification.

How to use the pythagorean theorem calculator

Enter both legs.
The hypotenuse is computed and checked with a² + b² = c².

Examples

a = 5, b = 12

Answer: c = 13

Formulas

Pythagorean Theorem

a^{2} + b^{2} = c^{2}