radius=1/2 diameter so R=3cm
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Radius time 2 equals the diameter.
you cant: pi is the same for any circle - 3.1415... the diamter or the radius has to be given diameter divided by two equals the radius the radius times two equals the diameter
72, double the radius because radius is half of the whole diameter.
The radius is half the diameter. Therefore, 770 divided by 2 equals 385mm
Circumference = (pi) x (diameter) Diameter = 2 x radius