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10 Cards in this Set
- Front
- Back
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Reflection across x-axis |
“Flips” an object across the x-axisThe x-value remains the same, while the y-value changes signs.Rule: (x, y) -> (x, -y) |
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Reflection across y-axis |
“Flips” an object across the y-axisThe y-value remains the same, while the x-value changes signs.Rule: (x, y) -> (-x, y) |
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Reflection across y = x |
Object “flips” across the line y = xThe x & y values “switch”Rule: (x, y) -> (y, x) |
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Reflection across y = -x |
Object “flips” across the line y = -xThe x & y values “switch” and their signs changeRule: (x, y) -> (-y, -x) |
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Reflection through the origin |
Reflection in the origin is an example of a “point reflection”The signs of the x & y values change for each ordered pair.Rule: (x, y) -> (-x, -y) |
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Rotation of 90 degrees counterclockwise |
“Turns” 90º about the originRule: (x, y) -> (-y, x) |
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Rotation of 180 degrees counterclockwise |
“Turns” 180º about the originRule: (x, y) -> (-x, -y)Same as a reflection in the origin |
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Rotation of 270 degrees counterclockwise |
“Turns” 270º about the originRule: (x, y) -> (y, -x) |
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Dilation |
Each x & y value is multiplied by 1/2, resulting in the triangle getting smaller proportionally. |
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Translation |
“Slides” move an object left or right and up or down on a coordinate plane. |
