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radius = 5 m so circumference = 2*pi*r = 31.4159 m (to 4 dp)
Radius of circle: 5/2*pi m
The circumference of a circle with a radius of 3 m is: 18.85 m.
The circumference of a circle with a diameter of 7m is 21.98 m
The circumference of 12m is: 37.7 m