Flashcards: Chapter 1 Vocab
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Created by:
JLSheehan on February 7, 2011
Subjects:
Groups:
Geometry, Mrs. Sheehan's Class
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Terms | Definitions |
|---|---|
 point | a location represented by a capital letter |
| non collinear | points that do NOT lie on the same line |
| plane | a flat surface that has no thickness and extends without end |
| coplanar | points that lie on the same plane |
| opposite rays | two collinear rays that share the same endpoint |
| congruent | equal in measure |
| midpoint | a point that divides a segment into two equal parts |
| segment bisector | a line, ray, or segment that passes through a midpoint of a segment |
| angle | a figure that is formed by two rays that share an endpoint |
| acute angle | an angle that is greater than 0 degrees but less than 90 degrees |
| right angle | an angle that measures 90 degrees |
| obtuse angle | an angle that measures between 90 degrees and 180 degrees |
| straight angle | an angle that measures 180 degrees |
| adjacent angles | two angles having the same vertex and sharing one side |
| angle bisector | a ray that divides an angle into two equal measures |
| vertical angles | opposite angles formed by intersecting lines |
| supplementary angles | two angles that add up to equal 180 degrees |
| complementary angles | two angles that add up to equal 90 degrees |
| perpendicular | two lines that intersect to form right angles |
| vertex of an angle | where the rays of an angle meet |
| collinear | three or more points that lie on the same line |
| line | an infinite set of points that goes on forever in both directions |
| ray | a figure that has one endpoint and extends in another direction without end |
| segment | part of a line that is made up of two endpoints |
| parallel lines | coplanar lines that never intersect |
| linear pair | two adjacent angles whose sum is 180 degrees |
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