Write a program to read the radius of a circle and to compute its area and circumference. In an easy way we can say, it is just the double of the radius of the circle and is represented by’d’ or ‘D’. Consider a circle with radius ‘r’ and circumference ‘C’. To define the circumference of the circle, knowledge of a term known as ‘pi’ is required.

Half of that is the radius. How much area of the wall did it occupy, using pi = 22/7? Sometimes, the volume of a circle also defines the area of a circle.When the length of the radius or diameter or even the circumference of the circle is already given, then we can use the surface formula to find out the surface area. (This is the one case where the area of a circle and its circumference are equal to each other, although the units of measurement are different: for example, inches and square inches.) This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. the formula for circumference of a circle is 2 x pi x r (radius). wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Like many things in math, there are multiple solutions to this problem.