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# Pythagorean theorem calculator

Calculates the side length of a right triangle from two other sides using Pythagorean theorem. Created by user's request This content is licensed under Creative Commons Attribution/Share-Alike License 3.0 (Unported). That means you may freely redistribute or modify this content under the same license conditions and must attribute the original author by placing a hyperlink from your site to this work https://planetcalc.com/907/. Also, please do not modify any references to the original work (if any) contained in this content.

One of our users asked why we do not have calculator on Pythagorean theorem.
Indeed, we've already have plenty calculators about triangles but none about right triangle. Well, may be because of it's simplicity. Anyway, if someone lazy to calculate by yourself - here it is. As usual, some theory can be found below the calculator #### Side length of a right triangle

Digits after the decimal point: 2
Side length

### Pythagorean theorem

The Pythagorean theorem, also known as Pythagoras' theorem states that the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

If we denote hypotenuse as c and two legs as a and b, we can write the following equation, often called the Pythagorean equation:

From this we can easily get the formulas for the uknown value.
In the calculator above, if you select "two legs" option, then you are solving for the hypotenuse (c), and the hypotenuse is

If you select "leg and hypotenuse" option, then you are solving the remained leg, and if it is a, then it equals to

If it is b, then it equals to

P.S. Wikipedia says there are 367 ways to prove Pythagorean theorem.

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