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Mathematics 10 Online
OpenStudy (anonymous):

Find the reference angle for -210^0 A) 150 degrees B) 60 degrees C) 240 degrees D) 30 degrees

OpenStudy (anonymous):

30

OpenStudy (mathstudent55):

A reference angle is an angle in the first quadrant that measures the same as the angle made by the given angle and positive or negative x-axis.

OpenStudy (mathstudent55):

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