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math66-77
| Question | Answer |
|---|---|
| translation | transformation that moves all the points in a plane a fixed distance in a direction |
| translation vector | its direction shows the direction of the translation and its length give the distance each point travels |
| 1.properties preserved by translations 2.properties NOT preserved by translations | 1. A.the orientation of the figure B. any property that has to do with the size of the figure a. lengths of the sides b. measure of angles c. area and perimeter 2. location of the figure |
| symbol for a translation vector an coordinate plane | <4,2> means 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 |
| interior and exterior of an angle | ***figure on notecard |
| 1. right angle 2. acute angle 3. obtuse angle | 1. 90 degrees 2. <90 degrees 3. >90 degrees but <180 degrees |
| equal vectors | have the same direction and the same length |
| vector sums | for vector sums, the following is true: xy+by=xb equal meaning that they start and end in the same places |
| opposite rays | if a point is between two other points on a line the two opposite rays are formed |
| bearings | 1. describe positions 2. measured clockwise from north |
| 1. origin of a vector 2. endpoint of a vector | 1. begging point of a vector 2. ending point of a vector |
| vector symbol | 1. a directed line segment 2. measured counterclockwise from the horizontal 3. symbol |
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