Pythagorean Theorem calculator

The Pythagorean theorem calculator will help you find the missing side when two sides are given with ease. Just enter two values in the box below and the calculator will display the answer and step-by-step solution.

Pythagorean Theorem Calculator

Enter the known value(s) and click Calculate to find the missing side(s). Only non-negative numbers are allowed.

Side a:

Side b:

Hypotenuse c:

How to use the Pythagorean theorem calculator to check your answers.

Example #1

Suppose you are looking at a right triangle and the side opposite the right angle is missing. However, the legs measure 11 and 60. First, use the Pythagorean theorem to solve the problem. The side opposite the right angle is the hypotenuse or c.

c² = a² + b²c² = 11² + 60²

c² = 121 + 3600

c² = 3721

c is equal to the square root of 3721, so c = 61

Now here is how to check your answer with the Pythagorean theorem calculator.

Enter 11 in the field that says " a = "

Enter 60 in the field that says " b = "

Then, click on the button that says " calculate "

You should get the same answer!

Example #2

Suppose you are looking at a right triangle and the side opposite the right angle is equal to 53 and the length of one leg is 45. Find the length of the other leg. In this problem, c = 53 and a = 45

c² = a² + b²53² = 45² + b²

2809 = 2025 + b²

2809 - 2025 = b²

784 = b²

b is equal to the square root of 784, so b = 28

Now here is how to check your answer with the Pythagorean theorem calculator.

Enter 53 in the field that says " c = "

Enter 45 in the field that says " a = "

Then, click on the button that says " calculate "

Again, you should get the same answer!

Geometry calculator

Centroid of a triangle calculator