What is the Pythagorean theorem?

For right triangles: a² + b² = c², where c is the hypotenuse and a, b are legs.

What is a hypotenuse?

The hypotenuse is the longest side of a right triangle, opposite the 90° angle.

Area = (a × b) / 2, where a and b are the two legs.

Free Pythagorean theorem calculator. Find the hypotenuse or legs of a right triangle. Calculate area and perimeter.

Find the missing side of a right triangle using the Pythagorean theorem.

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