# Circumference of Circle

### Text-only Preview

Circumference of Circle
Circumference of Circle
Today I am going to tell u about what is the what is the circumference of a circle. Before that
one thing which comes is what is a circle. So the circle is simply a shape following a path with
al points which have same distance from the center of the circle.
In a simple mathematical manner we can say that a circle is basical y a type of line. To
understand circumference of the circle we need to understand the basic concepts like Center,
Center is the point inside the circle and al the points on the line of circle are positioned at
same distance from the center point. The radius of the circle is defined as the distance from
the center of circle to any of the point on the circle. Basically it is the half of the diameter.
Now let us see what is the circumference of the circle. The circumference is a very special
perimeter and is the distance around a circle. It is the length around it. We always need the
value of the diameter of the circle to find the it's circumference.
Diameter is a line which must pass through the center of the circle. Diameter is always equal
to the double (twice) of the radius of the circle. To find the circumference of the circle we

Math.Tutorvista.com
Page No. :- 1/4

The formula of calculating the circumference of circle is given below
c = *d
Here c is circumference is the diameter, and r is the radius of the circle. The (pie) is a
constant having value 3.14. This value is needed to calculate the value of circumference.
As we know that diameter of a circle is twice or double of the radius so here we have d =2.r
here r represents the radius. By substituting this value in the above equation we get:
C =2r
The circumference of any circle is the exact length around that circle. This length is equal to
360 degree.
Let us take an example to understand the basic behind the circumference of the circle:
A circular field has a radius 12 meters then its circumference will be calculated by applying the
simple method below:
By using the above formula circumference of the circle = . d
And d = 2r so d = 2 * 12 = 24 so the circumference becomes = . d = (22/7) * 24 = 75.428
meters.
Again let us consider an example where the diameter is given instead of the radius of the
circle
Let the diameter of the circle is 14 meter then circumference of the circle become (22/7) * 14 =
44 meters.

Math.Tutorvista.com
Page No. :- 2/4

Similarly if circumference of the circle is given then fol owing procedure is required to find
radius or diameter of the circle. If Circumference = 66 then
c =2r
66 = 2 x 3.14 x r
r = 10.50 m
So from the above examples we get to know that the circumference of a circle depends on the
value of the radius or diameter of the circle.

Math.Tutorvista.com
Page No. :- 4/4

ThankYouForWatching
Presentation

• ﾿