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Find the hypotenuse or a missing leg of a right triangle.
How the calculation works
In a right triangle the square of the hypotenuse equals the sum of the squares of the other two sides. Choose whether to solve for the hypotenuse or a missing leg.
Formula used
a² + b² = c²
Example
With legs 3 and 4, the hypotenuse is 5, the area is 6 and the perimeter is 12.
Frequently asked questions
Does this work for any triangle?
No, only right triangles.
Can the hypotenuse be shorter than a leg?
No. The hypotenuse is always the longest side.
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Results are estimates for general information only and are not professional financial, medical or legal advice.