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| Figures in a plane can be _______, ________ or ________ to produce new figures. |
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reflected
rotated
translated |
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| the operation that maps or moves the preimage to the image. |
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| a transformation that preserves lengths of things, angle measures, parallel lines, and the distance between points. |
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Reflections in the y-axis.
(x,y)→ |
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Reflections in the x-axis.
(-x,y)→ |
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| A reflection is an isometry. |
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| Define center of rotation. |
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| the fixed point on which a figure turns around. |
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| Define angle of rotation. |
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-degree measure
-clockwise or counter-clockwise |
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| Define rotational symmetry. |
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| a figure can be mapped onto itself by a rotation of 180º or less. |
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| A rotation is an _______. |
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| For a 90º clockwise rotation... |
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1. switch x and y
2. negate new "y" coordinate |
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| For a 90º counter-clockwise rotation... |
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1. switch x and y
2. take opposite of the new "x" coordinate. |
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| On a polar graph, figures move... |
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| A vector measures two things: |
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1. magnitude (size or distance)
2. direction |
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| A translation is an _______. |
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