Circumference: 12*pi = 37.699 cm rounded to three decimal places
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perimeter of a circle = circumference = pi x diameter perimeter = 3.1416 x 12 = 37.7 cm
C=3.14D C=12x3.14 C=37.7+12=49.7
Well, the diameter would be 24, so the circumference would be π (pi, 3.14) times the diameter.24 x 3.14 = 75.36Apply this to all your math when using circumference. BTW if it is telling you the DIAMETER, just multiply by pi to get your answer.
Diameter of a circle = circumference/pi
The diameter of a circle with the circumference of 3.25 is: 1.034