This calculator calculates for the length of one side of a right triangle given the length of the other two sides. A right triangle has two sides perpendicular to each other. Sides "a" and "b" are the perpendicular sides and side "c" is the hypothenuse. Enter the length of any two sides and leave the side to be calculated blank. The number of Decimal Places in the calculated value can be specified. Please check out also the Right Triangle Calculator and the Irregular or General Triangle Calculator. This Calculator has been updated. For the older version please click here.