Pythagorean Theorem Calculator

Find a missing side of a right triangle with a² + b² = c².

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In the hypotenuse mode, c is the hypotenuse.

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The theorem

a² + b² = c²

In a right triangle the square of the hypotenuse (c, opposite the right angle) equals the sum of the squares of the legs. Classic example: 3, 4, 5.

How to use Pythagorean Theorem Calculator

  1. Choose which values you know.
  2. Enter them.
  3. Read the full solution.