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B. 60 derajat
C. 120 derajat
sorry kolo jawaban aku salah, tapi kaya-nya itu deh
yang D aku ga tahu coba cari sendiri yaa...
180°-120°= 60°
<acb = 65°
180°-55°-60°=65°
<acg = 115°
180°-65°=115°