Answer:
18 inches
Step-by-step explanation:
[tex]a=\pi r^2[/tex]
This is the formula for finding the area of a circle. We already know the area, so we'll move the terms in the equation to better fit our purposes.
[tex]r=\sqrt(\frac{a}{\pi} )[/tex]
Now let's substitute.
[tex]r=\sqrt(\frac{324\pi}{\pi} )[/tex]
We'll cancel out unnessicary terms:
[tex]r=\sqrt(324)[/tex]
This gives us the following:
[tex]r = 18[/tex]
In other words, the radius of the circle is 18 inches (NOT square) :D hope this helps :D
