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Rotation 90 degrees LEFT
(x,y) → (—y, x)
Rotation 180 degrees
(x,y) → (—x, —y)
Rotation 270 degrees LEFT / 90 RIGHT
(x,y) → (y, —x)
Translation a,b
(x,y) → (x+a, y+b)
Dilation k
(x,y) → (kx, ky)