Reverse Pythagorean Theorem Calculator

Last updated: April 5, 2026

Hypotenuse c

Known leg a

Other leg b

12.000000

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How to Use

Enter hypotenuse and a known leg to compute the other leg instantly.

Formula

Given hypotenuse c and leg a: other leg b = √(c² − a²), requires c > a

FAQ

Why is result blank?: If the hypotenuse is not greater than the leg, no real triangle exists.
Which leg is which?: Either leg can be labeled a—the missing side is the other leg.
Precision?: Shown to several decimals—round for practical measurements.

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