Pythagorean Theorem Calculator

Enter 2 out of 3 to solve for the missing side or all 3 for the pythagorean proof:
<--- Side 1
<--- Side 2
<--- Hypotenuse

Given a right triangle with a side length of 3 and a Hypotenuse of 5, calculate the remaining side:

The Pythagorean Theorem is shown below:
Side12 + Side22 = Hypotenuse2
This is also written as a2 + b2 = c2 where c is the hypotenuse.

Solving for Side 2 by isolating it and taking the square root of both sides, we get:
Side 2 = √Hypotenuse2 - Side 12

Plugging in our Hypotenuse and Side 1, we get
Side 2 = √52 - 32
Side 2 = √25 - 9
Side 2 = √16
Side 2 = 4