Geometry Ch. 1 Sect. 1
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Created by:
swimmerchick on August 26, 2010
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11 terms
Terms | Definitions |
|---|---|
 undefined term | words that dont have a formal definition but there is an agreement about what they mean |
| point | represented by a dot, has no dimension |
| line | infinite length, one dimension, represented by a bar with 2 arrow heads |
| plane | has 2 dimensions, its represented by a parallelogram, extends without end in 2 directions |
| colinear | points that lay on the same line (must have 3 or more points to be colinear) |
| coplanar | points that lay on the same plane |
| line segment | consists of 2 endpoints A and B and all the points in between them (represented by a bar over the name) |
| ray | contains one endpoint and all pints on the line go in 1 direction (represented by a bar with one arrowhead going to the right over the name/ the first letter in the name is endpoint) |
| opposite ray | if point C lies on line AB between A and B, then CA and CB are opposite lines (together the 2 new names make a line) |
| types of intersection of a line and plane | 1. no intersection 2. one point (line goes through plane) 3. infinite number of points ( line on top of plane) |
| types of intersection of two planes | 1. no intersection 2. one line |
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