名校
解题方法
1 . 如图,在正方体
中,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/e07fe735-0048-48ba-99b8-b82ed9a0e216.png?resizew=190)
(1)求证:
平面
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/e07fe735-0048-48ba-99b8-b82ed9a0e216.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f11f1840eb8b17e7b07c3fe7e987a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a0e00113872f921116b6c0c3177d0f.png)
您最近一年使用:0次
2021-08-15更新
|
1463次组卷
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4卷引用:河北省石家庄市藁城新冀明中学2021-2022学年高一下学期期中数学试题
解题方法
2 . 如图,在四棱锥
中,四边形
是平行四边形,E,F分别是棱
的中点,则( )
![](https://img.xkw.com/dksih/QBM/2021/4/26/2708158757355520/2761353085026304/STEM/be150e06-2f05-4271-b3a2-1deedcdcd0a9.png?resizew=268)
![](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/fd895896d3a9611913128855ea9c0b44.png)
![](https://img.xkw.com/dksih/QBM/2021/4/26/2708158757355520/2761353085026304/STEM/be150e06-2f05-4271-b3a2-1deedcdcd0a9.png?resizew=268)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2021-07-10更新
|
1036次组卷
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3卷引用:河北省邢台市2020-2021学年高一下学期第二次月考数学试题
3 . 如图,在五面体ABCDEF中,已知
平面ABCD,
,
,
,
.
(1)求证:
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334fec9ec91596bf9d2b41568123715f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c7e9926f9c81bfebc6d4aff3487c8b.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05925f665156215b1e031ea6c190616a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/ff431cc1-2209-4b47-88d7-96dec46a23e0.png?resizew=169)
您最近一年使用:0次
2021-06-14更新
|
2849次组卷
|
6卷引用:河北省深州市长江中学2020-2021学年高二下学期第一次月考数学试题
河北省深州市长江中学2020-2021学年高二下学期第一次月考数学试题第14章:几何体中的表面积与体积(B卷提升卷)-2020-2021学年高一数学必修第二册同步单元AB卷(新教材苏教版)江苏省南京市江浦高级中学文昌校区等五校2020-2021学年高一下学期期末联考数学试题(已下线)考点32 直线、平面平行的判定及其性质-备战2022年高考数学(文)一轮复习考点帮(已下线)第08讲 简单几何体的表面积和体积(核心考点讲与练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(已下线)第32讲直线与平面垂直2
名校
解题方法
4 . 如图,在三棱锥
中,点
分别是
的中点,
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634710018048000/2635906144518144/STEM/6c7321b9-d1d0-4625-9f78-c00380456784.png)
(1)证明:
∥平面
;
(2)若三棱锥
是底边长为3的正三棱锥,且该体积与表面积为24的正方体的体积相等,求该正三棱锥的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a77aa6c27acfffcc601d9ca7e6d4c7.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634710018048000/2635906144518144/STEM/6c7321b9-d1d0-4625-9f78-c00380456784.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
您最近一年使用:0次
2021-01-14更新
|
709次组卷
|
4卷引用:河北师范大学附属中学2021-2022学年高一下学期期中数学试题
名校
解题方法
5 . 如图,在直三棱柱
中,
,
,
分别在
,
上,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/bfd518ed-739f-4ec1-ac2e-defd6e8b01fe.png?resizew=140)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96a6b20a35af7755e5d90789ea862da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd46f855496616b6babd5a1eae8d801c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/bfd518ed-739f-4ec1-ac2e-defd6e8b01fe.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
6 . 如图,在三棱柱
中,侧棱
底面
,底面
是正三角形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40bfd0a1577203a09814b25bcdb59941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d178e36807ed1266d300dc850a957aa.png)
![](https://img.xkw.com/dksih/QBM/2020/1/9/2373269142536192/2373984737361920/STEM/dec05d8a327144b09a2d97334e6b6ad4.png?resizew=180)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6eca7a916f82bdbc5444e92e84aaa6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40bfd0a1577203a09814b25bcdb59941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d178e36807ed1266d300dc850a957aa.png)
![](https://img.xkw.com/dksih/QBM/2020/1/9/2373269142536192/2373984737361920/STEM/dec05d8a327144b09a2d97334e6b6ad4.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d560542b646924eaf577480ac73281b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
您最近一年使用:0次
2020-01-10更新
|
717次组卷
|
2卷引用:河北省邯郸市2019-2020学年高三上学期期末考试数学(理)试题
7 . 在棱长为1的正方体ABCD-A1B1C1D1中,点E,F分别是侧面AA1D1D与底面ABCD的中心,则下列说法错误的个数为
①DF∥平面D1EB1; ②异面直线DF与B1C所成的角为
;
③ED1与平面B1DC垂直; ④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2845c3f1a4ecc1756779edb272f1e9.png)
①DF∥平面D1EB1; ②异面直线DF与B1C所成的角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
③ED1与平面B1DC垂直; ④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2845c3f1a4ecc1756779edb272f1e9.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2019-11-05更新
|
813次组卷
|
8卷引用:2018年高考2017年11月份衡水联考文数试题
2018年高考2017年11月份衡水联考文数试题河北省承德市隆化县存瑞中学2019-2020学年高三上学期第二次质检数学(文)试题(已下线)黄金30题系列 高二年级数学(文) 小题好拿分【提升版】宁夏回族自治区银川市一中2019-2020学年高三11月月考数学(文)试题吉林省梅河口五中(实验班)等联谊校2019-2020学年高三上学期期中数学(文)试题安徽省合肥市第八中学2020-2021学年高二上学期第一次段考理科数学试题(已下线)第30练 空间点、线、面的位置关系-2021年高考数学(理)一轮复习小题必刷陕西省宝鸡市陈仓区2021届高三下学期第一次质量检测文科数学试题
名校
8 . 以下命题(其中
表示直线,
表示平面)
①若
,则
②若
,
,则
③若
,
,则
④若
,
,则
其中正确命题的个数是______________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ea64ea196fc9d88be23c053e278219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b330d69a949d9b55f4b6f18f47e0a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b330d69a949d9b55f4b6f18f47e0a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e076b91a9178217532e11c496400e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
其中正确命题的个数是
您最近一年使用:0次
2019-05-08更新
|
962次组卷
|
2卷引用:河北省唐山市开滦第二中学2019-2020学年高二上学期期中数学试题