Right Triangle Calculator
Solves the hypotenuse, area and perimeter of a right triangle from its two legs.
Lilu Baba's Right Triangle Calculator applies the Pythagorean theorem to find the hypotenuse, then computes area and perimeter.
How to use this calculator
- Enter the lengths of the two legs (the sides forming the right angle).
- Hypotenuse, area and perimeter update instantly.
Hypotenuse
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Area
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Perimeter
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FAQ
Right Triangle Calculator — frequently asked questions
Using the Pythagorean theorem: c = √(a² + b²).
Area = (leg a × leg b) ÷ 2, since the two legs are perpendicular.