Question 1042607
A wheel whose radius measures 18 inches is rotated.  If a point on the circumference of the wheel moves through an arc of 10 inches,  what is the measure,  in radians,  of the angle through which a spoke of a wheel travels?
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It's as simple as you can get.
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Angle = arc/radius = 10/18 radians.
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All parts move thru the same angle.