Area = (pi) x (1/2 of the diameter)2
11-inch diameter ==> 95.033 square inches of area (rounded)
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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.
The area of 3.5-inch diameter circle is: 9.621 square inches.
The area of a 18-inch diameter circle is: 254.5 square inches.