Radius = 1/2 of diameter = 7/2 = 3.5 inches
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17.4 inches
4.6; the diameter of a circle is twice its radius.
20; the diameter of a circle is twice its radius.
The diameter of any circle is twice the radius. Hence, for this particular circle, the diameter is 106.
The circumference of a circle whose radius is 6 inches is: 37.7 inches.