Answer: π * (18/2)^2
= 3.14 * 81
= 254.34 inches
Explanation:
Formula of circle's area: πr^2, or 3.14 * radius to the power of 2
Since the radius is diameter divided by 2, the radius is 9
So, we can do 3.14 * 9 to the power of 2, which is 81.
So the formula is 3.14 * 81, and 254.32 inches.