Question

How do we find an area of a circle ?!

Answer 1

We use the formula `pir^2`.

Explanation:

Where,

`pi` is a constant number. In fact, it is the ratio of the circumference to the diameter of any circle. It is approximately `3.1416`.

`r^2` is the square of the radius of the circle.

Example : The area of a circle with radius `10` cm would be:

`= pixx10^2`
`=3.1416xx100`
`=314.16cm^2`