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ЕГЭ математика.С2 прямоугольный параллелепипед
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7 Views·
03/31/20
В прямоугольном параллелепипеде , у которого
, , найдите угол между плоскостью и прямой EF,
проходящей через середины ребер AB и .
ABCD A1B1C1D1 AA1
= 3,
AD = 8 AB = 6 ADD1
B1C1
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