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Alisa1999WWW
14.03.2022 05:15

В треугольной пирамиде ABCD имеют место равенства АВ= CD, AD = ВС. Докажите, что прямая, проходящая через середины А С и BD, перпендикулярна АС и BD.

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Ответ:
вика28121
17.04.2019 03:40

решение к задаче приложено к ответу

В треугольной пирамиде ABCD имеют место равенства

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