circumference = diameter * pi. Therefore, diameter = circumference ÷ pi.
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The circumference of a circle with a diameter of 7.2 is 22.62. (rounded)
The circumference of a circle with a diameter of 1 cm would be 0.31. This is used a lot in math.
Diameter of a circle = circumference/pi
The diameter of a circle with the circumference of 3.25 is: 1.034
If the circumference of a circle is 17.27, the diameter is: 5.5