If the radius = 4.2, then the circumference = 26.4 meters.
If the diameter = 4.2, then the circumference = 13.2 meters.
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The radius of a circle if its circumference is 42 is about 6.68
A circle with a radius of 42 feet has a circumference of 263.89 feet.
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.