Предмет: Геометрия, автор: omakichioma2228

Геометрия иой худший ночной враг​

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Ответы

Автор ответа: xxxxx52
0
Кут 8 дорівнює 80°



……
omakichioma2228: ща проверю правильно или не
xxxxx52: Нуу…Правильно?
omakichioma2228: ещё не смотрела ,Ван секанд, мне просто нужно ещё одно задание сделать
omakichioma2228: если ты разбираешься можешь у меня в профиле посмотреть, но там сложнегько
omakichioma2228: Да ,молодец ,все правильно!
Автор ответа: filuksistersp735lh
1

Ответ:

\frac{ \angle6}{ \angle3} = \frac{4}{5} \\

нехай х-коефіцієнт пропорційності

оскільки ∠6+∠3=180° (вони внутрішні односторонні) то 4х+5х=180°

х=20°

∠6=4×20°=80°;∠3=5×20°=100°

∠8 і ∠6 вертикальні тому за означенням вони рівні тому ∠8=80°

відповідь: 80

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