Question
What is the Pythagorean theorem?
The Pythagorean theorem says that in a right triangle, the squares of the two legs add up to the square of the hypotenuse.
Math
Use OmniCalc's Pythagorean theorem calculator to solve right-triangle side lengths by finding a hypotenuse or a missing leg instantly.
Pythagorean theorem calculator
Choose whether to find the hypotenuse or a missing leg, then enter the known sides to calculate the result quickly.
Why this result matters
A strong geometry follow-on from slope and root work that still fits the growing math cluster. Use the tool above to enter a few clear inputs and get a practical answer you can use right away.
This Pythagorean theorem calculator helps students solve right triangles quickly by finding a missing hypotenuse or leg. It is useful for geometry homework, exam checking, and fast triangle side calculations.
Formula and method
The calculator uses a² + b² = c² for right triangles, either solving directly for the hypotenuse or rearranging the formula to solve for a missing leg.
Example
If you enter legs 3 and 4, the calculator returns hypotenuse 5.
FAQ
Short answers to the questions people often ask before or after using the tool.
Question
The Pythagorean theorem says that in a right triangle, the squares of the two legs add up to the square of the hypotenuse.
Question
Yes. If you know the hypotenuse and one leg, the calculator rearranges the formula to find the other leg.
Question
When solving for a missing leg, the hypotenuse must be longer than the known leg for a real right triangle.
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