SOLUTION: if the circumference of the circle is 42cm what is the length of AB if it is 120 degrees?

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Question 736471: if the circumference of the circle is 42cm what is the length of AB if it is 120 degrees?
Answer by MathLover1(20850) About Me  (Show Source):
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if the circumferance of the circle is 42cm

what is the length of AB if it is 120 degrees?
since 120 degrees is 1%2F3 of full central angle in the circle, the length of the arc AB will be 1%2F3 of the circumferance of the circle is
so, AB=%281%2F3%2942cm
AB=14cm