If a circle's diameter is 10, the circumference is: 31.416
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The circumference of a 10-inch diameter circle is: 31.42 inches.
Circumference of circle: 10*pi = about 31.4 inches
Circumference = pi*10 meters
diameter = 10/pi inches
There is a problem here. A circle with a 7-foot diameter has a circumference of 21.99 feet, not 10 feet.If the circumference is 10 feet, that would make the diameter 3.183 feet.