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Diameter = 2 x radius = 9 meters
radius = 44/(2*pi) in meters
The radius of a circle is 1/2 of its diameter. If the diameter is 15 meters, then the radius is 7.5 meters.
The formula for circumference is Radius X 2 X pi so for a radius of 11 meters is 11X2X3.1416= 69.12 (but because the accuracy of the radius measurement of 2 decimal places the answer is 69)
The circumference of a circle with a radius of 12 meters is: 75.4 meters (r x 2 x Pi = circumference).