8" circle = 50.26548 sq. "
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There are: pi*42 = 50.265 square inches rounded to three decimal places
The area of a circle with an 8 inch diameter is: 50.27 square inches. There are: pi*4 squared = 16*pi square inches or about 50 square inches
Area = pi*42 = 50.265 square inches to 3 decimal places
diameter = 8 inches so the radius will = 4 inches area of a circle = pi*radius2 area = 50.26548246 or 50 square inches to the nearest square inch.
Area of a circle = pi R2R = radius = 1/2 diameter.For diameter = 16 inches, Area = pi (8)2 = 64 pi = 201.1 square inches (rounded)