Circumference: 29*pi = 91.106 inches to 3 decimal places
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Circumference of a circle = 2*pi*radius or diameter*pi
The diameter of a circle with a circumference of 2.75 inches is: 0.875 inches (circumference divided by pi = diameter).
Diameter = 11.14 inches (approx) ~ Circumference can be found by pi * diameter.
Circumference = pi*diameter = 87.96 inches.
The circumference of a circle with a diameter of 45 inches is 141.37 inches.