Pythagorean Theorem Calculator
Calculate the missing side of a right triangle using any two known sides. Get the hypotenuse, legs, area, perimeter, and a clear step-by-step solution instantly.
Enter two known sides
Result
Enter two sides and click calculate.
Find the hypotenuse
Square both legs, add them, then take the square root: c = √(a² + b²).
Find a missing leg
Subtract the known leg's square from the hypotenuse's square, then take the square root.
Right-triangle rule
The theorem applies only to right triangles, where the hypotenuse is opposite the 90° angle.
Frequently asked questions
What is the Pythagorean theorem?
It states that in a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides.
Can the hypotenuse be shorter than a leg?
No. The hypotenuse is always the longest side of a right triangle.
Does this calculator support different units?
Yes. Select a unit and all linear results will use it. Area is shown in the corresponding squared unit.
Results are estimates generated locally in your browser using standard mathematical formulas. They are for informational and educational purposes only and are not a substitute for verification in coursework, examinations or professional contexts requiring certified accuracy. VisionVix accepts no liability for decisions based on this tool's output.
