64 pi
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Area = 50.265 cm2Circumference = 25.132 cm
Yes, you can.
The circumference of a circle with a diameter of 8 centimeters is = 8*pi cm
The radius is always exactly half of the diameter, so if the radius is 8 cm, then the diameter is 16 cm.
Radius = 1/2 of diameter = 4 cm