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Mathematics, 21.10.2020 14:01 imjustdumbsis

Площина α перетинає сторони АВ і ВС трикутника АВС і точках А1 і С1 відповідно, причому А1C1 : АC= 2: 5, А1B = 10 см. Знайти довжину відрізка
АB, якщо АС || α.

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Площина α перетинає сторони АВ і ВС трикутника АВС і точках А1 і С1 відповідно, причому А1C1 : АC=...
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