名校
1 . 如图,在多面体
中,底面
为矩形,侧面
为梯形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/f43f42a5-4cb4-4a9c-a8da-6ebcadb35367.png?resizew=179)
(1)求证:
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15cd53fe7b73365723ce4789bb259d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8225b3e02f5a9f1fd5a09ada650cb78.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/f43f42a5-4cb4-4a9c-a8da-6ebcadb35367.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccd5c41c921836b50f8e18abfdc5df3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
您最近一年使用:0次
2019-04-18更新
|
4940次组卷
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6卷引用:江西省赣州市寻乌中学2019-2020学年高二上学期第二次段考数学(文)试卷
2 . 已知
为直线,
为平面,有下列三个命题:
①
,
,
,则
;
②
,
,则
;
③
,
,则
;
④
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b330d69a949d9b55f4b6f18f47e0a37.png)
其中正确命题是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb74d1dd9a5c29da15e6cdaae435af86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675f1e09eb033dab8ef96d1f1c349150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187f7895012551f2067f0b77d8df2141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e076b91a9178217532e11c496400e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057cdb4057bca398a838e868efd360f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675f1e09eb033dab8ef96d1f1c349150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b330d69a949d9b55f4b6f18f47e0a37.png)
其中正确命题是
您最近一年使用:0次
2018高一上·全国·专题练习
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3 . 如图,在三棱锥P-ABC中,D,E,F分别是PA,PB,PC的中点.M是AB上一点,连接MC,N是PM与DE的交点,连接FN,求证:FN∥CM.
您最近一年使用:0次
2018-11-22更新
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2018次组卷
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9卷引用:陕西省咸阳市实验中学2020-2021学年高一上学期第三次月考数学试题
陕西省咸阳市实验中学2020-2021学年高一上学期第三次月考数学试题(已下线)2018年11月14日——《每日一题》人教必修2-平面与平面平行的性质(已下线)2019年11月17日 《每日一题》必修2-每周一测(已下线)【新教材精创】11.3.3平面与平面平行(第1课时)练习(1)(已下线)【新教材精创】11.3.3 平面与平面平行(第1课时)导学案(1)(已下线)第30讲 平面与平面平行(已下线)6.4.1直线和平面平行(课件+练习)(已下线)第八章立体几何初步知识-2(已下线)第8.5.3讲 平面与平面平行-同步精讲精练宝典(人教A版2019必修第二册)
名校
解题方法
4 . 在正方体
中,M是棱CD上的动点,则直线
与平面
的位置关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2cda9e5690d90d24c318895db59a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
A.相交 | B.平行 | C.异面 | D.相交或平行 |
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2018-10-19更新
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652次组卷
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4卷引用:【全国百强校】青海省西宁市第四高级中学2018-2019学年高二上学期第一次月考数学试题
【全国百强校】青海省西宁市第四高级中学2018-2019学年高二上学期第一次月考数学试题宁夏青铜峡市高级中学2020-2021学年高二上学期期中考试数学(文)试题(已下线)8.5.3 平面与平面平行(练习)-2020-2021学年下学期高一数学同步精品课堂(新教材人教版必修第二册)(已下线)8.5空间中的平行关系单元复习检测题 【师说智慧课堂】新教材人教A(2019)必修(第二册)
5 . 如图,三棱锥
中,
平面
,
,
,
是
的中点,
是
的中点,点
在
上,
.
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625395186098176/1635395675070464/STEM/5a7ebc730fc54d89b51a38bd4820cc6e.png?resizew=178)
(1)证明:
平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bae7599ad243c12d94325ad917f0a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51627b773b078f4b3651e4459e547da6.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625395186098176/1635395675070464/STEM/5a7ebc730fc54d89b51a38bd4820cc6e.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ca12f11f39405a6a49042c5e294862.png)
您最近一年使用:0次
2017-03-02更新
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2994次组卷
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2卷引用:2017届云南省师范大学附属中学高三高考适应性月考(五)数学(理)试卷
6 . 如图,矩形
和等边三角形
中,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/2017/2/21/1628718922661888/1629703587471360/STEM/4fd7b45810544db799e0a5fc6ecec358.png?resizew=191)
(1)在
上找一点
,使
,并说明理由;
(2)在(1)的条件下,求平面
与平面
所成锐二面角余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33bd236090a80b219b4a4cb91b56319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://img.xkw.com/dksih/QBM/2017/2/21/1628718922661888/1629703587471360/STEM/4fd7b45810544db799e0a5fc6ecec358.png?resizew=191)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3f843b83e62bab294988a7ea134a63.png)
(2)在(1)的条件下,求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b2ef1b525d302da087241e37387fa6.png)
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3卷引用:重庆市第三十七中学校2020-2021学年高二上学期10月月考数学试题