Question

Find the area of this circle

Answer 1

12 square inches

Explanation:

First, find the radius by dividing the given diameter by 2:

4 in / 2 = 2 in

Now, plug the radius value into the given formula «
`A=\pi r^2`»:

`A = \pi (2 \, \mathrm{in})^2`

And substitute 3 for π:

`A = 3 (2 \, \mathrm{in})^2`

`A = 3 * 4 \, \mathrm{in}^2`

`A = 12 \, \mathrm{in}^2`

So, the area of the circle is approximately 12 square inches.