Question

The radius of a circle is 2 inches. What is the circle's area?

Answer 1

`4pi` square inches

or approximately `12.56` square inches

Explanation:

The formula for the area of a circle is
`A=pir^2`

in this case `r=2"in" => r^2=4"in"^2`

Then the area of the circle `A` is

`A=4pi"in"^2approx12.56"in"^2`