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3x + 4x + 15 + 7x - 3 = 180°
14x + 12 = 180°
14x = 180° - 12
14x = 168°
x = 168°/14
x = 12°
Besar WZX
= 3x
= 3(12)
= 36°
Opsi [ D. ]
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SOAL 1
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3x + 4x + 15 + 7x - 3 = 180°
14x + 12 = 180°
14x = 180° - 12
14x = 168°
x = 168°/14
x = 12°
___________________________________________
Besar WZX
= 3x
= 3(12)
= 36°
Opsi [ D. ]
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