正四棱柱ABCD-A1B2C3D4中,AA1=2AB=4,点E在CC1上且C1E=3EC ⑴证明A1C⊥平面BED,⑵求二面角A1-DE-B的大小
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 15:53:42
![正四棱柱ABCD-A1B2C3D4中,AA1=2AB=4,点E在CC1上且C1E=3EC ⑴证明A1C⊥平面BED,⑵求二面角A1-DE-B的大小](/uploads/image/z/9499870-46-0.jpg?t=%E6%AD%A3%E5%9B%9B%E6%A3%B1%E6%9F%B1ABCD-A1B2C3D4%E4%B8%AD%2CAA1%3D2AB%3D4%2C%E7%82%B9E%E5%9C%A8CC1%E4%B8%8A%E4%B8%94C1E%3D3EC+%E2%91%B4%E8%AF%81%E6%98%8EA1C%E2%8A%A5%E5%B9%B3%E9%9D%A2BED%2C%E2%91%B5%E6%B1%82%E4%BA%8C%E9%9D%A2%E8%A7%92A1-DE-B%E7%9A%84%E5%A4%A7%E5%B0%8F)
xVKSG+{J%eA9am-rq(T`9 [@*a[
DYI'BK(1u=;26o`luôtH֠_=麪%tC'mq`_STZgӉ`%fkfWoۊ?IߛžJW,h`;4?WZN7c{;/7~p:
fsҀNqfFaU5[(w|Y˅pg864?n>蔍amTHk&w.
J)뛮)+2{SM5]/.ŴAUKrk tIAB@iCCΠF'C"I3-uzHQ:!"Y"V
.LG@
-Yo$ED>dK~u4B+{ ۵4Ξ[Bvxѱ$Nێ;l#열<,Ws-R$#
QY805@a)q+dʖ-qU89-NviඨM"xIz{9T05