بِسْـــمِ اللَّهِ الرَّحْمَــنِ الرَّحِيْمِ
Sudut berpelurus
x + 3x - 4 = 180
4x - 4 = 180
4x = 180
x = 180/4
x = 45°
Sudut bertolak belakang
3x - 4 = 2y - 11
3(45) - 3 = 2y - 11
135 - 3 = 2y - 11
132 + 11 = 2y
143 = 2y
y = 143 ÷ 2
y = 71,5°
وَاللَّهُ عَالَمُ بِاالصَّوَافَ
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بِسْـــمِ اللَّهِ الرَّحْمَــنِ الرَّحِيْمِ
Sudut berpelurus
x + 3x - 4 = 180
4x - 4 = 180
4x = 180
x = 180/4
x = 45°
Sudut bertolak belakang
3x - 4 = 2y - 11
3(45) - 3 = 2y - 11
135 - 3 = 2y - 11
132 + 11 = 2y
143 = 2y
y = 143 ÷ 2
y = 71,5°
وَاللَّهُ عَالَمُ بِاالصَّوَافَ