Quickly determine the length of the hypotenuse or a missing leg of a right-angled triangle with our free online Triangle Length Calculator. Simply input the known side lengths to apply the Pythagorean theorem for instant, accurate results. Perfect for students, engineers, and construction professionals.
Formula:
For a right-angled triangle with two shorter sides (legs) a and b, and the longest side (hypotenuse) c, the Pythagorean theorem states:
c = √(a² + b²)
Where:
a = Length of the first leg
b = Length of the second leg
c = Length of the hypotenuse