Pythagorean Theorem Calculator (hypotenuse)
Find the hypotenuse of a right triangle from its two legs.
Result
Hypotenuse (c)
5.0000
How it works
c = √(a² + b²)
For a right triangle, the hypotenuse equals the square root of the sum of the squares of the two legs. Example: 3 and 4 → 5.
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Frequently asked questions
What is the Pythagorean theorem?
In a right triangle, a² + b² = c², where c is the hypotenuse.
What are the legs and the hypotenuse?
The legs are the two sides forming the right angle; the hypotenuse is the longest side, opposite it.
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