In a circle with a diameter of 4, there would be approximately 12.56 square inches in the circle.
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A 4.75-inch diameter circle contains 17.72 square inches.
A 1.25-inch diameter circle contains 1.227 square inches.
A 20-inch diameter circle contains: 314.16 square inches.
Area = (pi) x (1/2 of the diameter)2 11-inch diameter ==> 95.033 square inches of area (rounded)
A circle with a 14 inch diameter has an area of 153.9 sq inches.