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math vocab 66-77
| Term | Definition |
|---|---|
| interior and exterior of an angle | image |
| 1. right angle | 90 degrees |
| 2. acute angle | <90 degrees |
| 3. obtuse angle | >90 degrees but <180 degrees |
| opposite rays | If a point is between two other points on a line, then two opposite rays are formed. |
| bearings | 1. describes position 2. measured clockwise from north |
| vector and symbol | 1. directed line segment 2. measured counterclockwise from the horizontal ( the positive x-axis) 3. symbol is half an arrow |
| 1. origin of a vector 2. endpoint of a vector | 1. beginning point of a vector 2. endpoint of a vector |
| equal vectors | have the same direction and the same length |
| vector sums | equal meaning that they start and end in the same place |
| translation | a transformation that moves all the points in a plane a fixed distance in a given direction |
| translation vector | its direction shows the direction of the translation, and its length gives the distance each point travels |
| 1. properties preserved by translations 2. properties NOT preserved by translation | 1. A. the orientation of the figure B. any property that has to do with the size of the figure: a. lengths of sides b.measures of angles c. area and perimeter 2. location of the figure |
| symbol for a translation vector on a coordinate plane | examples: <4,2> means to move the point 4 right and 2 up <-3,5> means to move the point 3 left and 5 up <-6,-1> means to move the point 6 left and 1 down |
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user-1965611