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Pythagorean Theorem Calculator

Math
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Calculates the length of a side of a right-angled triangle given the other two sides (a² + b² = c²).

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Length of side a and Length of side b in the units shown.

Step 2

Read Length of side c (Hypotenuse) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

3-4-5 Triangle

Length of side a: 3 units; Length of side b: 4 units

Length of side c (Hypotenuse): 5 units

5-12-13 Triangle

Length of side a: 5 units; Length of side b: 12 units

Length of side c (Hypotenuse): 13 units

8-15-17 Triangle

Length of side a: 8 units; Length of side b: 15 units

Length of side c (Hypotenuse): 17 units

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