如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且EF=E'F'
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/21 17:36:18
![如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且EF=E'F'](/uploads/image/z/13898558-38-8.jpg?t=%E5%A6%82%E5%9B%BE%2C%E6%AD%A3%E6%96%B9%E4%BD%93ABCD-A%27B%27C%27D%27%E4%B8%AD%2CAE%3DA%27E%27.AF%3DA%27F%27.%E6%B1%82%E8%AF%81%EF%BC%9AEF%E2%95%B1%E2%95%B1E%27F%27%E4%B8%94%E5%A6%82%E5%9B%BE%2C%E6%AD%A3%E6%96%B9%E4%BD%93ABCD-A%26%2339%3BB%26%2339%3BC%26%2339%3BD%26%2339%3B%E4%B8%AD%2CAE%3DA%26%2339%3BE%26%2339%3B.AF%3DA%26%2339%3BF%26%2339%3B.%E6%B1%82%E8%AF%81%EF%BC%9AEF%E2%95%B1%E2%95%B1E%26%2339%3BF%26%2339%3B%E4%B8%94EF%3DE%26%2339%3BF%26%2339%3B)
如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且EF=E'F'
如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且
如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且EF=E'F'
如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且如图,正方体ABCD-A'B'C'D'中,AE=A'E'.AF=A'F'.求证:EF╱╱E'F'且EF=E'F'
如图,在正方体ABCD-A'B'C'D'中,求证:B'D垂直面A'BC'
如图,在正方体ABCD-A'B'C'D'中,求二面角B-A'C'-D的平面角.
如图6,正方体ABCD-A'B'C'D'中,求证BC'垂直平面A'B'CD
如图在正方体ABCD - A'B'C'D'中,求二面角A'-BD-A的余弦值
如图,在正方体ABCD-A'B'C'D'中,求证面ACC'A'垂直面A'BD
如图、在正方体ABCD-A'B'C'D'中.求证:B'D'平行平面BC'D 求二面角C'-BC-C的正切值
如图在正方体ABCD-A'B'C'D'中,证AC⊥BD'抱歉,图无法呈现
如图,正方体ABCD-A'B'C'D'中,平面ABC'D'与正方体的其他各个面所成二面角的大小分别是多少!
急…如图,正方体ABCD-A'B'C'D'中,平面ABC'D'与正方体的其它各个面所成二面角的大小分别是多少?
几何:如图,在正方体ABCD-A'B'C'D'中,E,F分别是棱BC与C'D'的中点.求证EF∥平面BDD'B'
几何:如图,在正方体ABCD-A'B'C'D'中,E,F分别是棱BC与C'D'的中点.求证EF∥平面BDD'B'
如图,ABCD-A'B'C'D'是正方体判断B'C与平面ABC'D'的位置关系
如图,正方体ABCD-A'B'C'D'中,P为BC的中点,求AP与B'C所成的角.
如图,在空间直角坐标系中有单位正方体ABCD-A'B'C'D',求向量A'C*向量AC'
在正方体ABCD-A'B'C'D'中,求二面角C'-B'D'-A的大小
在正方体ABCD-A'B'C'D'中,求二面角B-A'C'-D的平面角
如图,图片审核中。口述下 正方体ABCD-A'B'C'D' ,E为CD中点,AB=a,求BB'与A'E的距离。
如图,在正方体ABCD-A'B'C'D'中,求证:ACC'A'垂直平面A'BD.