Circumference equals pi times diameter. Therefore you divide 39 by pi and get about 12.41
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The circumference of a circle with a 39 inch diameter is 122.52 inches.
The circumference of a circle with a diameter of 39 centimeters is about 122.5 cm (C = d x Pi)
39 inches / pi = 12.4 inches
First we have to find the radius: pi*radius2 = 120 sq ins Divide both sides by pi and then square root both sides: radius = 6.180387232 inches circumference = 2*pi*radius circumference = 38.83251825 or 39 inches to the nearest inch.
In terms of footage,a meter is about 39 inches. Multiply 6 by 39 you get 234. Divide 234 by 12 inches in a foot and you get 19.5 feet.