circumference of a circle = 2*pi*radius or diameter*pi
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Circumference of the circle = 1 times pi in miles
Circumference of the circle = 7*pi feet
The circumference of a circle with a diameter of 7m is 21.98 m
d = 0.31831 miles.
when you say just 7 that means a point. you can not take a circumference of jsut 7. when you take the circumference you need a circle. if your circle was radius of 7 then your circumference would be 2*pi*7 2*pi*7 = 43.96 units