A circle has a radius of 12.6 cm
What is the exact length of an arc formed by a central angle measuring 120°?
Express your answer using π
S = arc length
S = 2 pi (radius) (120 /360)
S = 2 pi (12.6) (1/3)
S = 25.2 / 3 * pi
S = 8.4 pi cm
+491 
