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sudut C = 180 derajat - (75+55) derajat
sudut C = 50 derajat
perbandingan sudut = A : B : C = 75 : 55 : 50
perbandingan rusuk = A:B:(50:10=5)
maka rusuk A = 75/10 = 7,5
rusuk B = 55/10 =5,5