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https://www.youtube.com/watch?v=__EkCimJgcY

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https://www.youtube.com/watch?v=xdO2Q88JvCs

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Example of how to find the measure of a linear pair

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Example of how to find the measure of a linear pair

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https://www.youtube.com/watch?v=zZoBUyoU6lA

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two angles whose measures add up to be 180 degrees

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two angles whose measures add up to be 90 degrees

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two angles whose two sides are opposite rays

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a pair of adjacent angles whose non common sides are opposite rays

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co planer angles with common sides, vertex and does not have any common interior points

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a ray that divides an angle into two congruent angles

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point that divides a segment into 2 congruent pieces. Point b is the midpoint of AC

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if 3 points (a, b, c) are co-linear and point b is in between a and c, then ab+ac= ac