Assuming that "1 inch round circle" refers to a circle whose circumference is 1 inch, its area is 51.34 sq mm.
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A 48-inch diameter circle has an area of: 12.57 square feet.
256*pi square inches Area of a circle = pi*radius2
452.16
There are: pi*1*1 = pi square inches
60 inch diameter = 2.5 ft radius.Area = pi*r2= 19.6 sq feet.