Area of a circle = pi*radius2
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It is: pi*5.52 = 95.033 square inches to 3 decimal places
If "3 inches" refers to the circle's diameter, then the radius is one-half of that.
Area = pi*102 = 314.159 square inches to 3 decimal places
Area = pi*42 = 50.265 square inches to 3 decimal places
0. There is no circle so no shaded area of a circle!