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K 0
0 K
Enlargement by scale factor K
1 0
0 -1
Reflection in x-axis
-1 0
0 1
Reflection in y-axis
0 1
1 0
Reflection in y=x
0 -1
-1 0
Reflection in y=-x
0 1
-1 0
Rotation 90° clockwise
0 -1
1 0
Rotation 90° anticlockwise
-1 0
0 -1
Rotation 180°
1 0
0 1
identity matrix