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Pythagorean Theorem Calculator

Find the missing side of a right triangle using the Pythagorean theorem.

Result

Missing Side0

How to Use the Pythagorean Theorem Calculator

  1. Choose which side you want to find.
  2. Enter the two known values.
  3. Click Calculate to find the missing side.

What is the Pythagorean Theorem?

The Pythagorean theorem states that in a right triangle, a squared plus b squared equals c squared, where c is the hypotenuse (the longest side) and a, b are the two legs.

Frequently Asked Questions

Does this only work for right triangles?

Yes, the Pythagorean theorem applies only to right triangles (triangles with a 90 degree angle).