Area of a circle is calculated by taking the radius squared times pi (3.14 approx.).
108 x 108 = 11,664
11,664 x 3.14 = 36,624.96
The area of a circle with a radius of 108 inches would be 36,624.96 square inches.
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The area is 1,020 square inches.
Using 3.14 as Pi the area of circle is: 200.96
pi*10*10 square inches
A circle with a radius of 11 inches has an area of 380.13 square inches.
A circle with a radius of 18 inches has an area of 1,017.88 square inches.