r=radius d=diameter
r=d/2
r=2/2
r=1 meter
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The radius of a circle is 1/2 of its diameter. If the diameter is 15 meters, then the radius is 7.5 meters.
radius = 44/(2*pi) in meters
Diameter = 2 x radius = 9 meters
The circumference of a circle with a radius of 12 meters is: 75.4 meters (r x 2 x Pi = circumference).
The circumference of a circle with a radius of 250 meters is about 1,571 meters. (C = r x 2 x Pi).