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*pencerminan pertama oleh y=-3
mengunakan rumus (x, 2h-y)
x=-9
y=11
h=-3
jawab:
(-9, 2.(11)-3)
(-9, 22-3)
(-9, 19)
*pencerminan kedua
pd titik (-9, 19) oleh y=5. (-9, 2.(5)-19)
(-9,-9)
*maaf kalau salah*