# How to find the area of a circle

If you want to know how to find the area of a circle firstly you need to know the formula of area of a circle to find out its area which is very simple i.e. area of a circle = Pi*r2 where Pi is a constant and r represents the radius of a circle. The procedure is described below.

## Apparatus:

• Ruler or anything that measures
• A calculator

## Procedure:

• First you have to measure the radius of a circle using a scale. For this you have to point out its centre and measure the distance from centre to the periphery of the circle.
• If you know the value of Pi then good but for your information Pi=3.14 approximately. Then you have to use the calculator to put the values to the formula where you have to multiply the value of pi with the square value of r which is radius of the circle.
• Then pressing the digits into calculator you can easily get your exact radius of a circle.

### Example 1

Let’s say that R=2.2 m

We know, Pi=3.14

Therefore, Area of a circle=Pi*R2

=3.14*(2.2m) 2

=15.19 m2

### Example 2

Let’s say that R=4m

Pi=3.14

Therefore, Area of a circle=Pi*R2

=3.14*(4m) 2

=50.24 m2, here m is unit of length.

Now you might not have any confusion of how to find the area of a circle so proceed to your study and best of luck.