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