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Sudut P + Sudut Q = 180
2x + 3x = 180
5x = 180
x = 36
Sehingga,
Sudut P = 2x
= 2(36) = 72 derajat
Sudut Q = 3x
= 3(36) = 108 derajat
Pilihan : A
72 dan 108
karena 80 : 120
2 : 3
jika dibuktikan
80 : 2= 40
120 :3 = 40