A plane figure with three straight side and three angles in known as triangle.

##### How to

Three side of triangle a, b, and c is provide by user.

calculate the semi-perimeter

calculate the area.

area = (s*(s-b)*(s-b)*(s-b))**0.5

##### Program

a = float(input("Enter first side")) b = float(input("Enter second side")) c = float(input("Enter third side")) s = (a+b+)/2 area = (s*(s-b)*(s-b)*(s-b))**0.5 print("The area of the triangle is %0.2f"%area)