Question

Find the exact area of a circle having the given circumference.

3pi

A =

2.25
3
9

Answer 1

This answer is correct, I double checked it and got it right on the assignment in OW. :)

Answer 2

A = 2.25π

Explanation:

The formula of an area of a circle:

`A=\pi r^2`

r - radius

The formula of a circumference of a circle:

`C=2\pi r`

We have:

`C=3\pi`

Substitute:

`2\pi r=3\pi` divide both sides by 2π

`r=1.5`

Substitute:

`A=\pi(1.5)^2=2.25\pi`