# How do you find the area of a circle whose diameter is 6 feet?

Jun 6, 2018

$9 \pi$ square feet

or

$28.27$ square feet

#### Explanation:

$A = \pi {r}^{2}$

The radius is simply half the diameter $r \equiv \frac{d}{2}$.

$A = \pi {\left(\frac{d}{2}\right)}^{2}$

$= \pi {\left(\frac{6}{2}\right)}^{2}$

$= \pi {\left(3\right)}^{2}$

$= 9 \pi$ square feet

which is roughly

$A = 28.27$ square feet