Area = Pi/4 x D2 = 0.7854 x 8 x 8 = 50.265 sq. units (rounded).
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The diameter is 8. The circumference is 8 pi. The area is 16 pi.
The area of a circle with an 8 inch diameter is approximately 50.27 square inches.
64 pi
The area is 50.265 square miles.
The area would be 50.3 m2.