Problem : If a circle's radius is 4, what is its circumference?

8(pi)

Problem : If a circle's circumference is 24Π, what is its radius?

12

Problem : A 20 degree arc is what fraction of the circumference?

1/18

Problem : What is the length of the major arc pictured below? (C is the center of the circle)

20

Problem : A circle has a chord of length ten. What is the minimum circumference of the circle?

10(pi)