Geometry

Pythogorean Theorem

Hypotenuse of a right triangle from legs a and b (workbook spelling).

Free to use — no sign-up or login.

Pythagorean theorem figure A right triangle with labeled legs, hypotenuse, and a marked right angle.

Enter valid values to draw the figure.

a, b = legs · c = hypotenuse

The hypotenuse c lies opposite the marked 90° angle and updates with legs a and b.

Hypotenuse c

This free Pythogorean Theorem covers Hypotenuse of a right triangle from legs a and b (workbook spelling).

Enter the Pythogorean Theorem fields, then read the output. Geometry calculators on this site keep the formula visible beside the form, with no account required.

Using the Pythogorean Theorem

Hypotenuse of a right triangle from legs a and b (workbook spelling). Typical inputs are Leg (a) and Leg (b). How it works beside the form states the identity the Pythogorean Theorem applies.

FAQ

How do I use the Pythogorean Theorem?

Open the Pythogorean Theorem, fill Leg (a) and Leg (b), and read the result. Take the square root of a² + b².

What formula does the Pythogorean Theorem use?

The Pythogorean Theorem uses the identity in How it works. In words: Take the square root of a² + b².

Sources