1 . 已知四棱锥
中,侧面
,
,
是边长为2的正三角形,底面
是菱形,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/cd06d4be-6fbd-4e21-96d8-da4d69a8d3cf.png?resizew=161)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e6abaf4df3a5f59f9499c11091c066.png)
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1325dd4994a26ed74ea50f4cf5539f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9104a1941e557a85fd1496bc2b9be297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.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://img.xkw.com/dksih/QBM/editorImg/2023/3/1/cd06d4be-6fbd-4e21-96d8-da4d69a8d3cf.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e6abaf4df3a5f59f9499c11091c066.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b811c48364df8285b036e3b15d51103.png)
您最近一年使用:0次
2019-11-30更新
|
625次组卷
|
3卷引用:宁夏吴忠中学2019-2020学年高二上学期期末考试数学(文)试题
名校
2 . 如图,四棱锥P-ABCD中,底面ABCD为矩形,PD⊥平面ABCD,点E、F分别是AB和PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/961c6f82-b6fa-4f7c-939c-4cb71f36f319.png?resizew=191)
(1)求证:AB⊥平面PAD;
(2)求证:EF//平面PAD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/961c6f82-b6fa-4f7c-939c-4cb71f36f319.png?resizew=191)
(1)求证:AB⊥平面PAD;
(2)求证:EF//平面PAD.
您最近一年使用:0次
2019-10-04更新
|
908次组卷
|
6卷引用:宁夏石嘴山市第三中学2019-2020学年高一上学期期末数学试题
11-12高二·湖南湘西·阶段练习
名校
解题方法
3 . 如图,四凌锥
中,
底面
,
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/552fd4d0-924d-4bbb-bc73-1e51fa6ddf31.png?resizew=208)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ff6d7dd48b57f03d82d2c522ee9b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555e29e445c95ddb514840f63fbb1d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/552fd4d0-924d-4bbb-bc73-1e51fa6ddf31.png?resizew=208)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544381069cb72bed5598ca5adc45ae26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
您最近一年使用:0次
2019-05-21更新
|
838次组卷
|
3卷引用:宁夏吴忠市吴忠中学2022-2023学年高二下学期期末考试数学(文)试题
宁夏吴忠市吴忠中学2022-2023学年高二下学期期末考试数学(文)试题(已下线)2011-2012学年湖南省凤凰县华鑫中学高二2月月考文科数学【全国百强校】云南省昆明第一中学2018-2019学年高一下学期期中考试数学试题
4 . 如图,在四棱锥P-ABCD中,侧面PAD是正三角形,且与底面ABCD垂直,底面ABCD是边长为2的菱形,∠BAD=60°,N是PB的中点,E为AD的中点,过A,D,N的平面交PC于点M.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/ecd8b03b-5409-48fd-8034-f486a3068a3b.png?resizew=207)
求证:(1)EN∥平面PDC;
(2)BC⊥平面PEB;
(3)平面PBC⊥平面ADMN.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/ecd8b03b-5409-48fd-8034-f486a3068a3b.png?resizew=207)
求证:(1)EN∥平面PDC;
(2)BC⊥平面PEB;
(3)平面PBC⊥平面ADMN.
您最近一年使用:0次
2019-02-08更新
|
964次组卷
|
7卷引用:【全国百强校】宁夏银川一中2018-2019学年高一上学期期末考试数学试题
【全国百强校】宁夏银川一中2018-2019学年高一上学期期末考试数学试题山东省寿光现代中学2016-2017学年高一5月检测数学试题(已下线)2018年11月24日 《每日一题》人教必修2-周末培优(已下线)章末检测2(课后作业)-2018-2019版数学创新设计课堂讲义同步系列(人教A版必修2)(已下线)2019年11月23日《每日一题》必修2-周末培优(已下线)【新教材精创】11.4.2 平面与平面垂直(2)导学案(2)沪教版(2020) 必修第三册 高效课堂 第十章 10.4平面与平面位置关系(2)
5 . 如图,
平面
,
,
,
,
分别为
的中点.(I)证明:
平面
;(II)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299aec7bf0fff4e5b8b0c59bf18ea726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aee33e4af8ef3bf5025d7e630abcfc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e975e7562572d24e6462e774f5fd491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b929f1f7b0c8cb489d29d0a6da6bc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9c457e757ac146cbb07008c58944fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72221ee5b504d596ff799c0b356aa0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://img.xkw.com/dksih/QBM/2010/3/17/1569642148438016/1569642225819648/STEM/58889a40b9254d45a4e63686d46109c5.png)
您最近一年使用:0次
2019-01-30更新
|
2740次组卷
|
16卷引用:【全国百强校】宁夏银川一中2018-2019学年高一上学期期末考试数学试题
【全国百强校】宁夏银川一中2018-2019学年高一上学期期末考试数学试题(已下线)2010年河北省唐山一中高二第二学期期末考试数学(文)试卷(已下线)2012-2013学年黑龙江哈尔滨第十二中学高二上期末考试理科数学卷河北省沧州市第三中学2019-2020学年高一下学期期末数学试题(已下线)【新东方】高中数学20210527-010【2021】【高二下】云南省丽江市2020-2021学年高一下学期期末数学试题(已下线)2009年普通高等学校招生全国统一考试文科数学(浙江卷)(已下线)2010-2011年河南省许昌高一下学期第四次五校联考数学试卷(已下线)2010-2011年重庆市杨家坪中学高二下学期第一次月考数学理卷2015届甘肃省天水市秦安县第二中学高三第五次检测文科数学试卷12015届甘肃省天水市秦安县第二中学高三第五次检测文科数学试卷22015-2016学年湖南长郡中学高一下第一次检测数学试卷2016-2017学年湖南省醴陵二中、醴陵四中高二下学期期中联考数学(文)试卷河北省武邑中学2017届高三下学期第三次模拟考试数学(文)试题(已下线)考点20 直线、平面平行的判定及其性质-备战2022年高考数学(文)一轮复习考点微专题河南省顶级名校2021-2022学年高一下学期5月月考数学试题
6 . 已知在四棱锥
中,平面
平面
,
,
,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6c44f2f7-b3c9-43c0-ae1b-1adbe950b752.png?resizew=173)
(1)求证:
平面
;
(2)若
与平面
所成角(直线
与其在平面
上正投影相交形成不大于
的角)为
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ad6a0124359e8b9f7649cf0bff51ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c8a72acdef14452a6c62f2a60a15fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6c44f2f7-b3c9-43c0-ae1b-1adbe950b752.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1508f3ca7797b21ee388b56410103c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccfd81d120348601cd611241d1a5dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
7 . 在底面是矩形的四棱锥P-ABCD中,
平面ABCD,PA=AB,E是PD的中点.
(1)求证:
平面EAC;
(2)求证:平面
平面PAD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c289acb452812bbdc946450178f0f3d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdf211c1d0846c4bb733553437070d0.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b17306376706b9fe714376167c9250.png)
您最近一年使用:0次
2018-03-26更新
|
862次组卷
|
6卷引用:宁夏吴忠中学2019-2020学年高二下学期期末考试数学(文)试题
名校
解题方法
8 . 如图,在三棱柱
中,
,
分别为
,
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/2018/2/4/1874882164301824/1876338015854592/STEM/5bcc8fa8ec3b4b3891f2dad885f9fd83.png?resizew=170)
(1)求证:直线
平面
;
(2)求证:直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7d857811cbd619f868d951aa7a0ab8.png)
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a909d59728483521a7ad892babd388a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4d8707d92f4abfcd6065b59542f7b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f52d26789b16e3da3b669f6ef91bbc.png)
![](https://img.xkw.com/dksih/QBM/2018/2/4/1874882164301824/1876338015854592/STEM/5bcc8fa8ec3b4b3891f2dad885f9fd83.png?resizew=170)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb3edb9e444eb488f867bb22e57ab58.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7d857811cbd619f868d951aa7a0ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb3edb9e444eb488f867bb22e57ab58.png)
您最近一年使用:0次
名校
9 . 如图,在四面体
中,已知
⊥平面
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2017/12/29/1848767764865024/1850555606409216/STEM/4ff295498ef44ffe9fe1addf3d0a9284.png?resizew=155)
(1)求证:
;
(2)若
为
的中点,点
在直线
上,且
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a351136b18bc7d3bd5122332772ab23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587df01a98f499a9f361aafd8c3dac39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2017/12/29/1848767764865024/1850555606409216/STEM/4ff295498ef44ffe9fe1addf3d0a9284.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812d539ca812e56693ba1e094bfd0874.png)
求证:直线//平面
.
您最近一年使用:0次
2017-12-31更新
|
575次组卷
|
2卷引用:宁夏石嘴山市第三中学2017-2018学年高一(创新班)上学期期末数学试题
10 . 在三棱锥
中,
和
是边长为
的等边三角形,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2017/10/25/1802938172497920/1804528005808128/STEM/8e3805b5-935d-4bbc-b233-09c0c8581ccb.png?resizew=155)
(1)求证:
平面
;
(2)求证:
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ab13ef156d034b710d811e09b0be34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8c7c8c8702adfbd6bcacc94a6bc661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe964aa3574061970c9c8066df21c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c2013527c6089d7df59bca21a4598c.png)
![](https://img.xkw.com/dksih/QBM/2017/10/25/1802938172497920/1804528005808128/STEM/8e3805b5-935d-4bbc-b233-09c0c8581ccb.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6748d9b9948485c5ba87ca8751c6e053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求证:
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(3)求三棱锥
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12卷引用:宁夏石嘴山市第三中学2018-2019学年高一上学期期末考试数学试题
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