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Chapter 2
vocabulary
Question | Answer |
---|---|
vector | A quantity that has both direction and magnitude |
initial point | The starting point of a vector |
terminal point | ending point of a vector |
translation | a transformation along a vector such that the segment joining a point and its image has the same length as the vector and is parallel to the vector |
perpendicular lines | lines that intersct at right angles |
perpendicular bisectors | a line perpendicular to the segment at the segments midpoint |
Reflection | reflection across line L maps point P to its image |
Rotation | A transformation around point P |
angle of rotation | The angle measure |
center of rotation | point around which a figure is rotated |
symmetry | In the transformation of a figure such that the image coincides with the preimage the image and the preimage have symmetry |
Line of symmetry | Each of the lines of a reflection |
rotational symmetry | A rotation maps the figure onto itself |
angle of rotational symmetry | greater than 0 but less than or equal to 180 |