Angle of rotation problems can come up in several NCEES FE Exams: Civil, Mechanical, and Other Disciplines. In mathematics, the angle of rotation is a measurement of the amount, of namely angle, that a figure is rotated about a fixed point, often the center of a circle.

A clockwise rotation is considered a negative rotation, so that, for instance, a rotation of 310 degrees (counter clockwise) can also be called a rotation of negative 50° (since 310 degrees + 50 degrees = 360 degrees, a full rotation ( or turn)).

A counter clockwise rotation of more than one complete turn is normally measured modjulo 360 degrees, meaning that 360 degrees is subtracted off as many times as possible to leave a non-negative measurement less than 360 degrees.

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