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No, the diameter of a circle is two times the length of its radius. So, to find the diameter, you would multiply the radius by 2, not π.
Because the circumference is equal to the diameter multiplied by pi or the radius multiplied by 2*pi.
24.492, unless you want more digits of pi besides the standard 3.14. The circumference of a circle is equal to the diameter multiplied by pi, or the radius multiplied by two, then multiplied by pi. c = d*pi c = 2*r*pi c = circumference d = diameter r = radius pi = 3.141593
If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)
radius = diameter/2 radius = circumference/2*pi
PI or 3.14 multiplied by Diameter or Radius x 2 12.56 approximately