3. 3x + 6x = 180
9x = 180
x = 180/9
x = 20°
4. Mencari x:
3x + 6x = 180
Mencari y:
2y = 3x (sehadap)
2y = 3(20)
2y = 60
y = 60/2
y = 30°
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3. 3x + 6x = 180
9x = 180
x = 180/9
x = 20°
4. Mencari x:
3x + 6x = 180
9x = 180
x = 180/9
x = 20°
Mencari y:
2y = 3x (sehadap)
2y = 3(20)
2y = 60
y = 60/2
y = 30°