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Chapter 1 Review

Across
Type of angle that measure 90 degrees
The segment, ray, or line that divides a segment or angle into two congruent parts
A section of a line that has endpoints (2 wds)
Term used to describe two figures of the same size and shape or measure
A location; denoted by a capital letter
A figure formed by two rays that have the same endpoint
Two rays that share a common endpoint and extend in opposite directions to form a straight line (2 wds)
The distance between two points
Has an endpoint and extends infinitely in one direction
A statement that is accepted without proof
Postulate 6 tells us that through any two points, there is exactly one of these; Postulate 9 tells us that one of these is formed by the intersection of two planes
The two sides of an angle meet at this common point
Down
Type of angle that measures less than 90 degrees
The point that divides a segment into two congruent segments
Important statements that are proven
Term used to describe two points that are the same distance from a fixed location
The set of all points; Postulate 5 tells us that it contains at least four points not all in one plane
Type of angle that measures 180 degrees
Term used to describe two angles that have a common vertex and a common side but no common interior points
Term used to describe objects located in the same plane
Theorem 1-1 tells us that if two lines do this, then they do it at exactly one point
Term used to describe points located on the same line
An endless flat surface; Postulate 7 tells us that at least one of these is formed by any three points
Type of angle that measure more than 90 degrees but less than 180