Pythagorean Theorem Calculator

Find the missing side of a right triangle using the Pythagorean theorem (a^2 + b^2 = c^2)

result (units)
5
area (sq units)
6
perimeter (units)
12

Frequently Asked Questions

What is the Pythagorean theorem?

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides: a^2 + b^2 = c^2.

Can I use the Pythagorean theorem for non-right triangles?

No, the Pythagorean theorem only applies to right triangles. For other triangles, use the law of cosines: c^2 = a^2 + b^2 - 2ab*cos(C).