# How do you find the area of a circle with radius 3 inches?

Sep 8, 2015

Area $= 9 \pi \approx 28.27433$

#### Explanation:

The area of a circle is given by the formula
$\textcolor{w h i t e}{\text{XXX}} A = \pi {r}^{2}$
where $A$ is the area of the circle,
$\textcolor{w h i t e}{\text{XX}} r$ is the radius of the circle, and
$\textcolor{w h i t e}{\text{XX}} \pi$ is a standard constant (approximately $\approx 3.14159$)

So with $r = 3$
$\textcolor{w h i t e}{\text{XXX}} A = \pi \cdot {3}^{2} = \pi \cdot 9 \mathmr{and} 9 \pi$