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9 February, 09:06

Area and circumference of a circle with diameter 4ft

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  1. 9 February, 11:49
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    Area of a circle is given by: A = pi * r^2 Circumference is given by : C = 2 * pi * r where r is radius: r = d / 2 = 4 / 2 = 2 ft So then: A = pi * 2^2 = 12.56 ft^2 C = 2 * pi * 2 = 12.56 ft
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