Предмет: Алгебра, автор: Ella928

какие прямые на рисунке 15.6 параллельны.Можно с обьяснением пожалуйста.

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Автор ответа: Аноним

Так как сумма внутренних односторонних углов 116°+64°=180° и 63°+117°=180°, то прямые c и d являются параллельными.

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