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24-03-2018
Mathematics

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An arc of a circle is 3πm long, and it subtends an angle of 72° at the center of the circle. Find the radius of the circle.

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gracibear gracibear

24-03-2018

72⁰_______3π m
360⁰______15π m

C = 15π = 2π r
r = 7•5 m

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