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Menghasilkan P'(0,3)
Karena diputar -90°
Putar balik untuk titik awal 90°
[x] = [0 -1][ 0-2 ] + [ 2] = [0 -1][-2] + [ 2]
[y] = [1 0][3-(-3)] + [-3] = [1 0][ 6] + [-3]
Menjadi:
[x] = [-6+2]
[y] = [-2 -3]
Sehingga,
(x,y) ⇒ (-4,-5)