If a right triangle has sides of length a, b and c, and if c is the largest, then it is called the hypotenuse. The length of the hypotenuse can be calculated with this formula: c = a2+b2 Assume that variables a and b have been declared as double and that a and b contain the lengths of sides a and b of a right triangle. Write a math expression that calculates the length of the hypotenuse. !!!!!C++ please!!!!