PP Section 6.1 - Radian Measure A ray , or half-line , is...

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Unformatted text preview: Radian Measure A ray , or half-line , is that portion of a line that starts at a point V on the line and extends indefinitely in one direction. The starting point V of a ray is called its vertex . V Ray Terminology If two lines are drawn with a common vertex, they form an angle . One of the rays of an angle is called the initial side and the other the terminal side . T e r m i n a l s i d e Initial Side Vertex Counterclockwise rotation Positive Angle Vertex Initial Side T e r m i n a l s i d e Clockwise rotation Negative Angle Vertex Initial Side T e r m i n a l s i d e Counterclockwise rotation Positive Angle An angle is said to be in if its vertex is at the origin of a rectangular coordinate system and its initial side coincides with with positive - axis. standard position x Initial side Vertex Terminal side x y When an angle is in standard position, the terminal side either will lie in a quadrant, in which case we say that the angle lies in that quadrant , or it will lie on the x-axis or the y-axis, in which case we say it is a quadrantal angle....
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PP Section 6.1 - Radian Measure A ray , or half-line , is...

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