area of circle formula code example

Example 1: area of circle

R = (3.14*r*r);

Example 2: area of circle

Area of circle = Pi * r^2 (r stands for radius and ^2 means squared)

Example 3: area of a circle

def circle(radius):
	return radius * math.pi * 2

Example 4: area of rectangle

Area of rectangle = Length * Width