-- 12 inches across the circle, along any route that passes through the center
-- 6 inches along any radius
-- 12 pi = 37.7 inches (rounded) around the circle's curvy line
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The area of a 3-inch diameter circle is about 7.068 square inches.
A circle with an 8-inch diameter has a perimeter of 25.1 inches.
19.63 square inches are in the area of a 5-inch diameter circle.
A circle with a 23 inch diameter has am area of 415.4756 sq inches (to 4 dp).
The area of a circle with an 8 inch diameter is approximately 50.27 square inches.