Предмет: Геометрия, автор: fed09

2 таблица доказать подобие и составить пропорцию

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Автор ответа: annzah

Рассмотрим ΔSET и Δ RKP: угол TSE=углу PRK как внутренние разносторонные при ST|| PR и секущей SR.Тогда ΔSET и Δ RKP -подобные за острым углом.Пропорция SERK = ETKP =STRP

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