So finally you see why math is important? Area=Pi X R X R where Pi=3.14159 R=radius of the circle. Lets say the circle is 2 feet in diameter. Then the area is Area=3.14159 X 1 X 1=3.14 Square Feet. Cool huh?
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441pi/4 sq ft
(60,000 sq ft) / (43,560 sq ft / acre) = 1.3774 acre (rounded)
Area 36 ft diameter circle = pi x radius squared = 3.1416 x 18 ft x 18 ft = 1017.87 sq ft
453
If the diameter of the circle is 4 feet across the area is about 12.6 sq ft. You can check this by using the formula Area=Pi times the radius squared.