№1 В правильной шестиугольной призме ABCDEFA1B1C1D1E1F1 все ребра равны 1. Найдите угол AC1C. ответ дайте в градусах. №2. В правильной треугольной призме площадь сечения, проходящего через боковое ребро и высоту основания равна 12v3 , сторона основания 4. Найти боковое ребро. №3. В прямой призме АВСА1В1С1 основание АВС: АВ=АС=10; ВС=12; АА1=15. Найти площадь сечения, проходящего через точку А1и противоположную ей сторону нижнего основания. ответ: 102. №4. В прямоугольном параллелепипеде стороны 5 и 12. Диагональ параллелепипеда образует угол 45°с плоскостью основания. Найти боковое ребро и площадь диагонального сечения. №5. В прямоугольном параллелепипеде стороны основания 15 и 8, площадь диагонального сечения 340. Найти боковое ребро.

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