Circumference of a circle = 2*pi*radius or pi*diameter
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The relation between diameter (distance across) and circumference (distance around) is found in the value of pi, or 3.14. Multiply the diameter by pi to get the circumference.
The circumference of a 3.5 inch circle is: 10.996 inches.
The radius of a circle with a 14.5 inch circumference is 2.15 inches
The circumference of a 27-inch circle is: 84.8 inches.
The circumference of a 21-inch circle is: 66 inches.(C = d x Pi).
The circumference of a 2.6-inch circle is: 8.17 inches.(C = d x Pi)