Circumference Of a Circle Formula

Today let us study about circumference of a circle formula.

The distance around a circle is called the circumference. The distance across a circle through the center is called the diameter. is the ratio of the circumference of a circle to the diameter. Thus, for any circle, if you divide the circumference by the diameter, you get a value close to . This relationship is expressed in the following formula: c/d= Π.
where is circumference and is diameter. Circumference, diameter and radii are measured in linear units, such as inches and centimeters.

Circumeference of a circle is calculated by the below formula

C = 2Πr

Where Π is equal to 3.14 and r is the radius.

Let us now solve some examples.

Example 1) What is the circumference of a circle with radius 5cms

Solution:

C = 2Πr

C = 2*3.14*5

C = 31.4

Example 2) What is the circumference of circles with radius 9cms

Solution:

C = 2Πr

C = 2*3.14*9

C = 56.52