Pythagorean theorem calculator
Enter any two sides of a right triangle. The third side comes from a² + b² = c².
How it’s worked out
- a² + b² = c²
Questions people ask
What does the Pythagorean theorem say?
In a right triangle, the square on the hypotenuse (the side opposite the right angle) equals the sum of the squares on the other two sides: a² + b² = c².
What are Pythagorean triples?
Whole-number sides that fit exactly, like 3-4-5, 5-12-13, 8-15-17 and 7-24-25. Builders use 3-4-5 to check a corner is square.