如图,已知在四棱锥
中,底面
是平行四边形,
为
的中点,在
上任取一点
,过
和
作平面
交平面
于
.
![](https://img.xkw.com/dksih/QBM/2022/6/8/2996963430260736/2998264787140608/STEM/46c2e4c38db54249a85c697061079e9d.png?resizew=183)
(1)求证:
平面
;
(2)求证:
平面
;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1b63ff147840a325bfd8653136b05d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838132d6d6d5177def1270bddeee3d39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://img.xkw.com/dksih/QBM/2022/6/8/2996963430260736/2998264787140608/STEM/46c2e4c38db54249a85c697061079e9d.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8677ae5ca7acf874d93789425d172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6ef7306c5965dbe4d0259102d6b74c.png)
21-22高一下·北京西城·阶段练习 查看更多[4]
北京市西城区第十三中学2021-2022学年高一数学6月线上测试试题(已下线)7.1 空间几何中的平行(精练)(已下线)7.1 空间几何中的平行与垂直(精练)(已下线)专题训练:线线、线面、面面平行证明
更新时间:2022-06-10 12:08:14
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】如图,在平行四边形AMCN中,
,
,将
沿AD折起,使点N到达点E的位置,且
,将
沿BC折起,使点M到达点F的位置,且
.连接EF,AF,DF.
![](https://img.xkw.com/dksih/QBM/2021/1/30/2647183146139648/2651787650367488/STEM/fdbea2035c1b480784620daba77b3d02.png?resizew=493)
(1)证明:
平面ABCD;
(2)若
,
,求四棱锥F-ABCD体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5486dd36cd13a5b7ad3ca3076b36e4d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0882294896d128e7b4505dcccc328f34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20d576d3824eaf583c67809124c6327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9874eca4abea481fa84eb772a920f9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d011d6ad89d0b033f96c2efbb314d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c230b2139256d8e4a7f964ccc8136d.png)
![](https://img.xkw.com/dksih/QBM/2021/1/30/2647183146139648/2651787650367488/STEM/fdbea2035c1b480784620daba77b3d02.png?resizew=493)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402c0f9eecfcdf73f9e87ca82a6f2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d735415b32e3e187a9ba11dd4361890.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知四棱柱ABCD—A1B1C1D1中,A1D⊥底面ABCD,底面ABCD是边长为1的正方形,侧棱AA1=2.
(I)求证:C1D//平面ABB1A1;
(II)求直线BD1与平面A1C1D所成角的正弦值;
(Ⅲ)求二面角D—A1C1—A的余弦值.
(I)求证:C1D//平面ABB1A1;
(II)求直线BD1与平面A1C1D所成角的正弦值;
(Ⅲ)求二面角D—A1C1—A的余弦值.
![](https://img.xkw.com/dksih/QBM/2010/5/8/1569722173816832/1569722178617344/STEM/b39865631239427ebeb523cf6ce21dae.png?resizew=230)
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解答题-证明题
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适中
(0.65)
解题方法
【推荐1】如图,四棱锥
的底面是正方形,设平面
与平面
相交于直线
.
.
(2)若平面
平面
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0bcc3c5b41a01362779683f5b70710c.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42dd36a8531e4da9fb92030d63085f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】如图1,在矩形ABCF中,
,E为CF的中点,现沿AE将
折起到
的位置,得到四棱锥
,如图2所示,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/6605526f-d9b6-4844-9089-4313231cb4a2.png?resizew=307)
(1)设平面ADB与平面CDE的交线为l,试探究l与EC的位置关系;
(2)求点C到平面DBE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077e97453ae00a89df35be3a0b722df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675127116b1cace5e3158a88b7a2044a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4151e948feebdf7b91fbe739feafa9bc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/6605526f-d9b6-4844-9089-4313231cb4a2.png?resizew=307)
(1)设平面ADB与平面CDE的交线为l,试探究l与EC的位置关系;
(2)求点C到平面DBE的距离.
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