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# Area of a Circle Formula

Document Description
Today we are going to discuss the important article which is Area of Circle. So first we will discuss that what is the actual meaning of area of circle. All points are in same distance from the center which is called circle and total space inside the circle is called area of circle. So friends now we will discuss the area of circle related formulas which are given below. 1. Area of circle (A) = ? r2 Where r is radius of circle, and ? is called constant value which is equal to 3.14 Unit of area of circle = (meter)2 =square of meter 2. Diameter: Diameter is twice of radius. Diameter of circle d = 2 x radius Where d is diameter Unit of diameter = meter
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Content Preview
Area of a Circle Formula
Area of a Circle Formula
Today we are going to discuss the important article which is Area of Circle. So first we wil
discuss that what is the actual meaning of area of circle. Al points are in same distance from
the center which is called circle and total space inside the circle is called area of circle.
So friends now we wil discuss the area of circle related formulas which are given below.
1. Area of circle (A) = ? r2
Where r is radius of circle, and ? is called constant value which is equal to 3.14
Unit of area of circle = (meter)2 =square of meter
2. Diameter: Diameter is twice of radius.
Diameter of circle d = 2 x radius
Where d is diameter
Unit of diameter = meter

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

Area of circle in terms of diameter =( ?/4) x d2
4. Circumference: the circumference of the circle is the total distance around the edge
Circumference = ? x diameter = ? d
Circumference = ? x 2 x radius = 2 ? r
Unit of circumference = meter
Let's see the Area of a Circle Formula based example
Example: find the area of circle where radius is 2m.
Solution: we know area of circle:
A = ?r2
In this example we have given radius r = 2
Area of circle (A) = ? (2)2
= 4?
= 4 x 3.14
= 12.56 m2
Example: find the area of circle where diameter is 4 m.
Solution: we know area of circle:

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

A = ? d2/4
In this example we have given d = 4 m
So area of circle = ? 42/4
= ? 16/4
= 4 ?
= 4 x 3.14 = 12.56
Area of circle = 12.56 m2
Example: find the diameter of circle where radius is 6m.
Solution: we know diameter of circle:
In this example we have given radius r = 2
Diameter of circle (d) = 2 x r
= 2 x 6
= 12

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

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