0, since it is invisibly small.
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For the small circle of diameter 6, the circumference is 18.84.
12 feet. The diameter of a circle is twice its radius.
Radius of circle: 12/2 = 6 units
A circle with a diameter of 12 inches has an area of 113.1 square inches.A circle has an area equal to its radius squared times pi. Your circle has a radius of 6 inches (half the diameter)6 X 6 X 3.14159...=113.097336
The radius of a circle is half the diameter, so the radius of a 6 inch diameter circle is 3 in.