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x' = x cosα - y sinα
y' = x sinα + y cosα
x' = 2 cos90 - (-4)sin90
x' = 0 +4
x' = 4
y' = 2 sin90 + (-4) cos90
y' = 2 - 0
y' = 2
setelah dirotasi = (4,2)
dilatasi :
x' = kx
y' = ky
x' = 3.4 = 12
y' = 3.2 = 6
jadi bayangannya ada di koordinat (12,6)