Right Triangle Calculator
From the two shorter sides of a right-angled triangle, find the hypotenuse, area, perimeter and angles.
Result
Hypotenuse
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Enter both legs (the two sides that form the right angle).
Enter the lengths of the two legs (the sides that meet at the right angle) to calculate the hypotenuse using the Pythagorean theorem, plus the area, perimeter and the other two angles.
Frequently asked questions
What is the Pythagorean theorem?
For a right-angled triangle, the square of the hypotenuse equals the sum of the squares of the other two sides: a² + b² = c². So legs of 3 and 4 give a hypotenuse of 5.