Area A pi x radius x radius. The formula to find a circles area p radius 2 usually expressed as p r 2 where r is the radius of a circle. In this example you will learn about C program to find area of the circle with and without using the function.
Area of circle can be calculated by using the formulas.
A pr2 2 A p r 2 2. As you can see it is important to pay attention to whether or not you are given the radius or the diameter of the circle. Area of a circle diameter. To find the area using the radius or the length from the center of the circle to the edge use the formula area pr2 where r is the radius.