Its radius is: 4/2 = 2 cm
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Radius = 1/2 of diameter = 4 cm
2 cm
Radius = Diameter / 2 In this case, diameter = 8 cm so radius = 4 cm
It is: 2*4 = 8 cm
Radius of a circle with diameter 4? Radius is half of the diameter, so in this case it would be 2.