8 ∠KOR = ∠RON + ∠NOE + 20° ∠KOR, ∠RON, ∠NOE -?

∠KOR + ∠RON + ∠NOE = 180°

∠KOR = ∠RON + ∠NOE + 20°

∠RON + ∠NOE + 20° + ∠RON + ∠NOE = 180°

2∠RON + 2∠NOE = 160°

∠RON + ∠NOE = 80°

∠KOR = 80° + 20° = 100°

Пусть ∠RON = x, тогда ∠NOE = 80° - x

Ответ: ∠KOR = 100°, ∠RON = x, ∠NOE = 80° - x