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Coterminal Angles

Coterminal Angles

Angles which, drawn in standard position, share a terminal side. For example, 60°, -300°, and 780° are all coterminal.

 

Circle showing coterminal angles 60°, 780°, and -300° sharing the same terminal side, with initial side along positive x-axis.

 

See also

Measure of an angle, side of a polygon