If the area of circle O is 16π, what is the length of an arc on the circle formed by a central angle measuring 45 degrees?
Pick:
A) π  B) 3π/2  C) 2π  D) 5π/2  E) 8π
Area = 16π   Radius = 4   Circumference = 2 x 4 x π = 8π   Angle forming the arc = 45 degrees. 45/360 = 1/8.   Therefore length of arc = 1/8 * 8π = π - πnswer choice π.
<result>A</result>
If the area of circle O is 16π, what is the length of an arc on the circle formed by a central angle measuring 45 degrees?