rotations and reflections
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14 Terms
1
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rotation (turn)
a figure is moved about a fixed point called a rotation center
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90 degrees turn
270 CW (-y,x)
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180 degrees turn
180 CW (-x,-y)
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270 degrees turn
90 CW (y,-x)
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Origin
(-x,-y)
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reflections (flip)
mirror image of a figure or a point
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glide reflection
consists of a line reflection and translation (combination of 2 transformation)
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reflection rules
mirror image of a figure or a point
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over x-axis
(x,-y)
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over y-axis
(-x,y)
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over y=x
(y,x)
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over origin
(-x,-y)
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over y=-x
(-y,-x)
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reflecting over a point
midpoint formula
