GEOMETRY / CALCULATOR
Pythagorean Theorem Calculator.
Find a right triangle’s hypotenuse from its two legs.
LET’S WORK IT OUT
Your numbers, your answer.
THE WHY BEHIND THE ANSWER
How it works.
In a right triangle, the square of the hypotenuse equals the sum of the squares of the two perpendicular sides.
THE FORMULAc = √(a² + b²)
Worked example
With legs 3 and 4, c = √(9 + 16) = 5.
Good to know
Both legs must use the same unit. The formula applies to right triangles.
ONE MORE THING
Which side is the hypotenuse?
It is the side opposite the right angle and the longest side of a non-degenerate right triangle.