名校
解题方法
1 . 如图,在四棱锥
中,
平面
,
,
,
,
, E为PD的中点,点F在PC上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/ca551637-980a-49cc-b8d0-20e7bfe56d93.png?resizew=174)
(1)求证:
平面
;
(2)设点G在PB上,且
.判断直线AG是否在平面AEF内,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a923784f083b7f4777891afe06b44e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88454ace46996b99361d18e76189cdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/ca551637-980a-49cc-b8d0-20e7bfe56d93.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)设点G在PB上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557010ef2b20618df4771ac66daef18f.png)
您最近一年使用:0次
2 . 如图是正方体的平面展开图,则在这个正方体中:
①
② CN与BM所成角为60°
③ ED与CF为异面直线 ④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbc83cb600a400247590b343869195e.png)
以上四个命题中,正确命题的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/2df9ed0a-a5c8-4821-ae07-08872f49beeb.png?resizew=188)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f4aa0f6dabcecfc4f776724a6cfbe.png)
③ ED与CF为异面直线 ④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbc83cb600a400247590b343869195e.png)
以上四个命题中,正确命题的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/2df9ed0a-a5c8-4821-ae07-08872f49beeb.png?resizew=188)
A.①② | B.②③④ | C.②④ | D.③④ |
您最近一年使用:0次
2022-07-05更新
|
327次组卷
|
2卷引用:四川省乐山市2021-2022学年高二下学期期末考试数学(文)试题