Pythagorean Theorem Calculator
Find the missing side of a right triangle from the other two with the Pythagorean theorem, shown step by step.
Find the missing side of a right triangle from the other two with the Pythagorean theorem, shown step by step.
Your result will appear here
In a right triangle with legs a and b and hypotenuse c, . Enter any two sides and leave the third empty; the calculator finds it and shows the working.
Example
a = 3, b = 4
→ c = 5
c is the hypotenuse, the side opposite the right angle and the longest side.
No. The theorem holds only for right triangles. For other triangles use the law of cosines in the Triangle Calculator.