A circle with a radius (d/2) of 9 meters has a circumference of 56.5 meters.
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circumference = pi*18 = 56.549 m rounded to 3 decimal places
The circumference of a circle with a diameter of 7m is 21.98 m
The circumference of a circle with a radius of 3 m is: 18.85 m.
A circle with a radius of 10 m has a circumference of 62.83 m.
Circumference of circle: 1 times pi in m