Program: 136

If the lengths of the sides of a triangle are denoted by a, b, c, then area of triangle is given by

area = √(S(S-a)(S-b)(S-c))
Where, S = (a+b+c)/2.

Write a c function to calculate the area of the triangle.

Output:

Enter a: 3
Enter b: 2
Enter c: 4
Area of Triangle: 2.904737