An 8.2-inch diameter circle has an area of 52.81 square inches.
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Formula for finding the area of a circle: Area = pi * r2 a = 3.14 * 82 a = 3.14 * 64 a = 201.06
Area of the circle in square inches = pi*82
pi*82 = 64*pi or 201.0619298 square units.
Area = pi*82 = 201.062 square units to 3 d.p.
Area = pi*3/82 = 0.4417864669 or 0.442 correct to three decimal places