Answer: approximately 254.34 square feet
Work Shown:
d = 18 = diameter
r = d/2 = 18/2 = 9 = radius
A = area of a circle of radius r
A = pi*r^2
A = 3.14*9^2
A = 254.34
The pool takes up approximately 254.34 square feet of area. Use more decimal digits of pi to get a more accurate answer.