Diameter, d = Circumference/piRadius, r = d/2
Area = pi*r2.
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28.26=area 18.84=circumference
circumference doesn't matter when solving for area..
The circumference of a circle is a line. Because it is a line it has no area, only length. So the area of the circumference cannot exist!
you divide the surface area by the circumference.
area from circumference area = ( circumference2 / (4 * pi) ) area = 2.865 square feet (approx)