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| An infinite set of points that extends in 2 directions. |
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| An infinite set of points that creates a flat surface that extends without ending. |
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| Points in the same plane. |
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| Part of a line with two endpoints. |
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| The distance between the two endpoints of a line segment. |
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| Part of a line with one endpoint and extending infinitely in the other direction. |
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| Rays with the same endpoint that extend in opposite directions. |
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Two segments that have the same length.
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A point that divides a segment into two congruent segments.
If Y is the midpoint of [image] , then XY=XY.
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| Segment Bisector Definition |
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| Segment Addition Postulate |
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| If B is between A and C, then AB + BC = AC. |
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| A figure formed by two rays that have the same endpoint. |
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| 2 angles with equal measures. |
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| Coplanar angles with a common vertex and a common side but no common interior points. |
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| An angle whose measure is less than 90. |
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| An angle whose measure is greater than 90 but less than 180. |
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| An example used to prove a statement false. |
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| Formed by interchanging the hypothesis (p) and conclusion (q) of a statement. |
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| When a statement and its converse are both true, the words "if and only if" are used when combined into a _________. |
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| Two angles whose measures have the sum of 90. |
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| Two angles whose measures have the sum of 180. |
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| Two angles such that the sides of one angle are opposite rays to the sides of the other angle. |
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| If B is the midpoint of segment AC, then AB = 1/2 AC. |
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| A line, segment, ray, or plane that intersects a segment at its midpoint. |
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