October 2021 0 5 Report
Найдите объем прямоугольно паралелипипеда A B C D a1 b1 c1 d1 если  а) Аc1=1м , угол с1АС=45* с1АB=60*
б) Аc1=24cм c1Аа1=45* диагональ Ас1 составляет угол в 30* к плоскости боковой грани 
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