Angle - two rays with a common endpoint, Initial Side - The non-rotating ray that sits in standard position, Terminal Side - The ray that is allowed to rotate, Rotation angles - Angles with a terminal and initial side in the unit circle, Standard Position - vertex is at origin and the initial side lies on the ositive side of the x-axis, Positive rotation - When the angle results from a counterclockwise rotation, Negative rotation - when the angle results from a clockwise rotation, Quadrantal angle - An angle whose terminal side lies on either the x-axis or the y-axi, Co-terminal - angles in standard position that share the same terminal side,

Unit Circle Vocabulary

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