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Консультация № 200670
17.04.2021, 18:05
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
В тетраэдре ABCD на ребре AB взята точка M, а на ребре CD точки N и P так, что BM=1/4BA, CN=DP=1/4CD. Первое сечение проведено через точки M и N параллельно BD, второе сечение – через точки M и P параллельно AD. Постройте сечения, их линию пересечения и определите отношение площадей частей, на которые она разделяет второе сечение.
Прикладываю рисунок с построенными сечениями. Пояснения к обозначениям:
DT=AD/4; AK=AC/4; BL=BD/4; CR=BC/4. TMRN - первое сечение, KPLM - второе.
В тетраэдре ABCD на ребре AB взята точка M, а на ребре CD точки N и P так, что BM=1/4BA, CN=DP=1/4CD. Первое сечение проведено через точки M и N параллельно BD, второе сечение – через точки M и P параллельно AD. Постройте сечения, их линию пересечения и определите отношение площадей частей, на которые она разделяет второе сечение.
Прикладываю рисунок с построенными сечениями. Пояснения к обозначениям:
DT=AD/4; AK=AC/4; BL=BD/4; CR=BC/4. TMRN - первое сечение, KPLM - второе.
Обсуждение
18.04.2021, 00:41
общий
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