The area of a circle of radius 21 is 1386
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A circle with a radius of 21 cm has an area of ~1,385.44 square cm
Using 3.14 as Pi the area of circle is: 1384.74
Area = pi*212
Using 3.14 as Pi the area of circle is: 1384.74
A circle with a radius of 21 yards has an area of 1,385.44 square yards.