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Matrixes
Maxtrixes to memorize for easy rotation and reflection coordinates
7
Mathematics
9th Grade
02/26/2012
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Cards

Term
Rotation of 90°
(counterclockwise)
 Definition
0 -1
1 0
Term
Rotation of 180°
(counterclockwise)
 Definition
-1 0
0 -1
Term
Rotation of 270°
(counterclockwise)
 Definition
0 1
-1 0
Term
Reflection across x-axis
 Definition
1 0
0 -1
Term
Reflection across y-axis
 Definition
-1 0
0 1
Term
Reflection across origin
(a.k.a. rotation of 180° about the origin)
 Definition
-1 0
0 -1
Term
Reflection across line y=x
 Definition
0 1
1 0
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