Circles and Arc Length

• 42.55

• 29.55

• 39

• 23

• 42

• 30

• 33.33

• 27.66

The circumference of the circle is 70. What is the length of semicircle JLK ?

• 140

• 11.14

• 22.28

• 35

• 47.64

• 42

• 56.88

• 23.32

What is the length of arc BB'?

Find the arc length.  Leave your answer in terms of π.

• 7/4π

• 7/2π

• 1/8π

• 45π

• 20

• 120

• 60

• 180

• 200

• 480

• 360

• 270

The radius of the circle is 16. What is the circumference?

• 25.13

• 32

• 50.27

• 100.53

The circumference of the circle is 28.27. What is the diameter?

• 9

• 18

• 4.5

• 88.81