بِسْـــمِ اللَّهِ الرَّحْمَــنِ الرَّحِيْمِ
Jumlah sudut segitiga = 180°
109° + 31° + y° = 180°
140° + y° = 180°
y° = 180° - 140°
y° = 40°
وَاللَّهُ عَالَمُ بِاالصَّوَافَ
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بِسْـــمِ اللَّهِ الرَّحْمَــنِ الرَّحِيْمِ
Jumlah sudut segitiga = 180°
109° + 31° + y° = 180°
140° + y° = 180°
y° = 180° - 140°
y° = 40°
وَاللَّهُ عَالَمُ بِاالصَّوَافَ
-S-