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A central angle of 1 radian is the angle that subtends an arc equal in length to the radius. If diameter = 5 m, then radius = 2.5 m. 2.5 m --> 1 radian 6 m is subtended by (6 / 2.5) = 2.4 radians.

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Q: Find the number of radians in the central angle that subtends an arc of 6 m on a circle of diameter 5 m?
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