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jadi Segitiga A+B+C=180
A=2x
B=3x
C=40
A+B+C=2x+3x+40=180
5x+40=180
5x=180-40
5X=140
X=140/5
X=28
A=2X=2(28)=56
B=3X=3(28)=84
Jadiiii
X=28
A=56
B=84