解题方法
1 . 如下图,四棱锥
中,底面
是矩形,
平面
,且
,
,
,
是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/8a9fe8dc-43be-4e42-bce7-eb854f21d6a9.png?resizew=265)
(1)求证:平面
平面
;
(2)若
是线段
的中点,在线段
上是否存在一点
,使得
平面
?若存在,求出线段
的长度;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/8a9fe8dc-43be-4e42-bce7-eb854f21d6a9.png?resizew=265)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92c3dbf9981a81f4093c9760943e21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbbe7f48676298f2ee0cb1901992eaf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8badfeb9e7556486e02ab60df4dd32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbbe7f48676298f2ee0cb1901992eaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
您最近一年使用:0次
名校
解题方法
2 . 在正方体
中.
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220499513712640/2221089699241984/STEM/d64269675fca4533a7deea17e368ce25.png?resizew=154)
(1)若
为棱
上的点,试确定点
的位置,使平面
;
(2)若
为
上的一动点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4cf99a0d5833beacc3a0ee39d39458.png)
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220499513712640/2221089699241984/STEM/d64269675fca4533a7deea17e368ce25.png?resizew=154)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4ee628f1f5b2c224e4e9a759ffc305.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba8f7af0e091e082100c3cd7f8c487f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/349740b9aa8c242258eb07cb7224c3f6.png)
您最近一年使用:0次
2016-12-03更新
|
817次组卷
|
2卷引用:2015-2016学年四川省雅安中学高二10月月考数学试卷
3 . 在如图所示的圆台中,
是下底面圆
的直径,
是上底面圆
的直径,
是圆台的一条母线.
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/d8dfa2d9ecab4a0bac28eb4cb0ea2d11.png)
(1)已知
分别为
的中点,求证:
;
(2)已知
,
,求二面角
的余弦值.
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/c2026a00dac745a68d4be98ea57eb968.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/a994fec3fcf7465893f75c85217ef6ed.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/0417464253404fc491a1b3f2c534446d.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/315207c4cfdc43f487d79597ecc3af03.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/59ae6b20c1c44748857ac45f52020115.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/d8dfa2d9ecab4a0bac28eb4cb0ea2d11.png)
(1)已知
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/9421fba81f044da9927d1133821ca8b1.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/33636cafc63c46508c6d51a7dd3e22d5.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/3b5afd95420043b48d0f0b9ce314d996.png)
(2)已知
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/1018033148a743d9a84f8b7d80c4a7fa.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/c6d9212110084093b3757a8bc01a3f03.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021933821952/1573021939400704/STEM/757b3eb9e96f4cf98b32ada934b17a44.png)
您最近一年使用:0次
12-13高一上·北京·期末
解题方法
4 . 在四棱锥
中,底面
是直角梯形,
,
,
,平面
平面
.
(1)求证:
平面
;
(2)求平面
和平面
所成二面角(小于
)的大小;
(3)在棱
上是否存在点
使得
平面
?若存在,求
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0073c8e806d0399a6983e163f0fd176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b489c25405ce48699d4f0a62820bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ba22238cdff318a4bd9d4d746b3229.png)
(3)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5865d488a9cf1181016fd2e866177cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b505e0df1131e3a93fc81d13f6e224e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/fa4fd412-897c-4621-b148-dc248d6cc7a6.png?resizew=135)
您最近一年使用:0次
2016-12-02更新
|
651次组卷
|
5卷引用:2011-2012学年北京市育园中学高一第一学期期末考试数学
(已下线)2011-2012学年北京市育园中学高一第一学期期末考试数学(已下线)2011-2012学年北京市海淀区高三上学期期末考试理科数学(已下线)2013届天津市天津一中高三第三次月考理科数学试卷北京西城回民中学2018届高三上期中数学(理)试题北京市东城区2018届高三上学期期中考试数学试题
解题方法
5 . 如图所示,已知三棱柱
中,若
是棱
的中点,在棱
上是否存在一点
使
平面
?并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
![](https://img.xkw.com/dksih/QBM/2016/11/18/1579005317308416/1579005317939200/STEM/f407eed13de5401bb2963db997db5530.png)
您最近一年使用:0次
2016-12-13更新
|
741次组卷
|
3卷引用:2016-2017学年山西省实验中学高二10月段测数学试卷
6 . 如图,菱形
的中心为O,四边形ODEF为矩形,平面ODEF⊥平面ABCD,DE=DA=DB=2
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/f21f1a63-c619-44be-9c22-e6ae8bcbbde4.png?resizew=414)
(1)若G为DC的中点,求证:EG//平面BCF;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/f21f1a63-c619-44be-9c22-e6ae8bcbbde4.png?resizew=414)
(1)若G为DC的中点,求证:EG//平面BCF;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2ee4d5eb7eef9da9703c7422227fab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd03fcf55cebae42cad8103228a3922.png)
您最近一年使用:0次
解题方法
7 . 在如图所示的空间几何体中,
,四边形
为矩形,点
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/94b70457-2bed-4173-bea2-2b86b2f4ad61.png?resizew=190)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec346cba41b378fcd97f1607835e259a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/94b70457-2bed-4173-bea2-2b86b2f4ad61.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ade8233bc5e455bc00825e081647519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2016-12-04更新
|
699次组卷
|
2卷引用:2016届山东省济宁市高三下学期3月模拟考试文数试卷
解题方法
8 . 如图,三棱锥
中,
⊥底面
,
,
,
为
的中点,
为
的中点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/2016/1/15/1572437735358464/1572437741314048/STEM/86b747fb97d94f2f9b74cb15f70d645a.png?resizew=132)
(1)求证:
⊥平面
;
(2)求证:
∥平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3cc9cccfb4c260dac05f4ed57e8c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a722f046ce210dce133cf61b130c7fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a41ada2c69a8c4ff1c0a9c780d2a08d.png)
![](https://img.xkw.com/dksih/QBM/2016/1/15/1572437735358464/1572437741314048/STEM/86b747fb97d94f2f9b74cb15f70d645a.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
9 . 如图,在直四棱柱ABCD-A1B1C1D1中,底面ABCD为等腰梯形,AB∥CD,AB=4,BC=CD=2,AA1=2,E,E1分别是棱AD,AA1的中点.
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168517840896/1573168524017664/STEM/9fc6451a3a80444aa6bc4092dd3b82d4.png?resizew=178)
(1)设F是棱AB的中点,证明:直线EE1∥平面FCC1;
(2)证明:平面D1AC⊥平面BB1C1C;
(3)求点D到平面D1AC的距离.
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168517840896/1573168524017664/STEM/9fc6451a3a80444aa6bc4092dd3b82d4.png?resizew=178)
(1)设F是棱AB的中点,证明:直线EE1∥平面FCC1;
(2)证明:平面D1AC⊥平面BB1C1C;
(3)求点D到平面D1AC的距离.
您最近一年使用:0次
2016-12-05更新
|
1395次组卷
|
2卷引用:2016-2017学年江苏徐州睢宁县古邳中学高二上第一次月考数学试卷
解题方法
10 . 如图,三棱柱![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
中,侧棱与底面垂直,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd8f940b796af67206b3f9dd410a407.png)
,点
为
的中点.
(1)证明:
平面
;
(2)问在棱
上是否存在点
,使
平面
?若存在,试确定点
的位置,并证明你的结论;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83beb9fd65e75633d2d5e7b010693899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd8f940b796af67206b3f9dd410a407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0204f76cda5ea4ced714588be1efeaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f36f074d1dc1054c679236ec70dcaf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
(2)问在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2015/12/15/1572364757123072/1572364763152384/STEM/699e4485f9e846778dbc49d87351ec9a.png?resizew=152)
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