Step-by-step explanation: 6 3 12 12
Big Circle circumference is C = 2π r1 r1 = OB is set to x
and is 3 times larger than the Smaller Circle circumference at C = 2π r2=OA
C = 2π x C/3 = 2π r2
(2π x) / 3 = 2π r2
x/3 = r2
The circumference of the smaller in terms of x is
C = 2π (x/3) which is the second answer