Jawabanmu

2014-05-18T20:01:04+07:00
Sudut A + sudut B= 180 drjt
3x + 6x = 180
9x = 180
x= 20 drjt

sdt ABC = 6x = 6.20 = 120 drjt
sdt BAC = 3x = 3.20 = 60 drjt
3 5 3
2014-05-18T20:02:03+07:00
Sudut berpelurus = <A + <B
180 = 3x + 6x
180 = 9x
x = 180/9
x = 20

<ABC = 6x
<ABC = 6(20)
<ABC = 120
<BAC = 3x
<BAC = 3(20)
<BAC = 60