Geometry flash cards chap. 1
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24 terms
Terms | Definitions |
|---|---|
 point | A dot that can be named |
| Line | A line goes on forever in each direction. |
| segment | A line that does not go on forever in either direction. |
| Ray | A line that goes on forever in one direction |
| Plane | A space that goes on forever that is named by a letter. |
| opposite Rays | Rays going in opposite directions |
| Space | A open area |
| Angle | the space between two lines or planes that intersect |
| Collinear | On the same line |
| Coplanar | On the same plane |
| Midpoint | The point that's directly inbetween two other points. |
| Bisect | To cut in two |
| Congruent | The same size |
| Vertex | The bent point or starting point of a angle |
| Complementary angles | Two angles whose sum is 90 degrees |
| Supplementary | sum of angles that equals 180 degrees |
| Vertical angles | Two lines that intersect and have two pairs of angles. |
| Adjacent angles | Angles that are right next to each other and add up too 180 degrees. |
| Linear pair | Two angles that add up to 180 |
| Acute angles | An angle that is less than 90 degrees |
| Obtuse angle | An angle that is more then 90 degrees |
| Right angle | An angle that is 90 degrees |
| Straight angle | An angle that is 180 degrees |
| Perpendicular | intersecting at or forming right angles |
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