area=pir^2 pi=3.14 for this quesiotn area=3.14r^2 diameter=2r d/2=r d=20 20/2=r=10 subsitute are=3.14(10^2) are=3.14(100) area=314 answer is 314 ft^2

Diameter of circle d = 20 feet Radius, r = d/2 = 20/2 = 10 feet. Area = πr² Area = 3.14 * 10² Area = 3.14 * 10 * 10 = 314 Area = 314 square feet.