Предмет: Геометрия, автор: qwfivf

СРОЧНО ПЖ!!!!!ДАЮ 100 БАЛОВ!!!!!!!!!! У правильній трикутній призмі ABCA1B1C1 сторона основи дорівнює 12 см. Через сторону АВ нижньої основи й середину сторони A1C1 верхньої основи проведено площину. Площа утвореного перерізу призми дорівнює 54 см^2 .Знайдіть площу бічної поверхні цієї призми

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Автор ответа: HGTVv

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qwfivf: как?

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