Jawabanmu

2014-05-30T18:46:12+07:00
Sudut A = 2/3B
sudut C = 3 1/3B = 10/3B
sudut B = ....?
jumlah sudut segitiga = 180
sudut A+B+C =180
2/3B+B+10/3B = 180
2/3B+3/3B+10/3B = 180
15/3B = 180
5B = 180
B = 180/5
B = 36