The area of a circle is pi × r2.
pi = 3.141592653589793
5 feet = 60 inches. The radius is half the diameter so the radius is 30 inches.
If you plug 30 inches into the formula you get the answer of 2827.4333882308138 inches for the area of the circle.
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A circle with a 27-foot diameter has an area of 572.56 square feet.
A 2-foot circle has an area of about 3.141 square feet.
379.94 square feet
The area of a circle is PI times the radius of the circle squared. The radius of a one foot diameter circle it 1/2 or .5 feet. .5 squared is .25 PI is 3.1416 3.1416 times .25 = .79 square feet So, there are about .8 square feet in a 1 foot diameter circle.
153.93804 square feet.