~Bonus poin~ Tolong bantu jawab besok mau di kumpulin #Pake Cara #No Spam

x + y = 180 - 90 - 30 = 60
z = 180 - 120 = 60
y = 180 - 90 - 60 = 30

perbandingan = 60 : 30 = 2 : 1