Circumference C = 2*Pi*r
r=d/2
therefore, C=Pi*d
C=3.14159265*3 cm ~= 9.4 cm
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The diameter of a circle when the circumference is 35 cm is: 11.14 cm (circumference divided by Pi = diameter).
The diameter of a circle with a circumference of 45 cm is: about 14.32 cm
The circumference of a circle with a diameter of 12 cm is: about 37.7 cm
If the circumference of a circle is 30 cm its diameter is: 9.549 cm
The circumference of a circle with a diameter of 1.3 cm is 4.08 cm