# trigonometry

find the number of radians in the central angle that subtends an arc of 6m on a circle of diameter 5m

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1. θ = s/r = (6 m)/(5/2 m) = 12/5 radians = 2.4 radians

r = s/θ = (60 ft)/(3π/2) = 40/π ft ≅ 12.732 ft

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