Answer :
The circumference of a circle is:
C = 2 π r /: 2 π ( we will divide both sides of an equation by 2 π )
C / 2π = r
Answer: 1) r = C over 2 pi
C = 2 π r /: 2 π ( we will divide both sides of an equation by 2 π )
C / 2π = r
Answer: 1) r = C over 2 pi