A circle with a radius of 4.5 cm has a circumference of 28.27 cm
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Circumference = 250*pi cm
circumference = pi*18 cm area = pi*92 square cm
Diameter in cm = circumference/pi
Circumference = 2*pi*radius or pi*diameter Circumference = 87.9645943 or 88 cm to the nearest cm
A circle with a radius of 9.3 cm has a circumference of 58.43 cm