8-15-17 Right Triangle Hypotenuse

With legs 8 and 15, the hypotenuse is exactly 17 — the 8-15-17 Pythagorean triple.

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How to use this tool

Enter side a and side b in the fields above.
Results update instantly as you type — or click Calculate.
Read your hypotenuse c and the full breakdown beneath it.

The 8-15-17 Pythagorean triple gives a perfect integer hypotenuse of 17 for legs 8 and 15.

Frequently asked questions

What is the Pythagorean theorem?: For a right triangle with legs a and b, the hypotenuse c satisfies a² + b² = c². Classic example: 3² + 4² = 9 + 16 = 25 = 5².