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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
Answered here :
Circumference = pi * d or pi * 2 r
pi * 2 * 12.6 = pi 25.2
We are looking for the fraction of the circumference that 120 out of 360 dgrees covers
120 /360 * pi 25.2 = 25.2 pi / 3