Question 34877
1. Find the radius of a circle with circumference of 20pi.
2.Find the radius of a circle with the circumference of 64pi
3.If the area of a circle is 9pi, find the radius.
4.If the area of a circle is 64 pi, find the circumference.

#1. Circumference = 2(pi)r=20(pi)
r=10
#2. 2(pi)r=64(pi)
        f = 32
#3. Area = (pi)r^2 = 9(pi)
   r^2=9
   r = 3
#4 (pi)r^2=64(pi)
      r^2=64
      r = 8
Cheers,
Stan H.