名校
解题方法
1 . 如图,在正方体ABCDA1B1C1D1中,E,F,G,H分别是BC,CC1,C1D1,A1A的中点.求证: EG∥平面BB1D1D.
![](https://img.xkw.com/dksih/QBM/2021/3/18/2680420021272576/2684993440227328/STEM/08ab0e6fa8af4bd7b512fe65ff8dfe90.png?resizew=124)
您最近一年使用:0次
名校
2 . 已知斜三棱柱
的侧面
与底面
垂直,
.且
为
中点,
与
相交于点
.
![](https://img.xkw.com/dksih/QBM/2021/3/4/2670588615450624/2670841255002112/STEM/b56a43efd2354b8daadc949665b5183f.png?resizew=172)
(1)求证:
平面
;
(2)求直线
与底面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bddea1644933eb8ca4dc980931417d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2021/3/4/2670588615450624/2670841255002112/STEM/b56a43efd2354b8daadc949665b5183f.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6748d9b9948485c5ba87ca8751c6e053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4c87f4da030d05da7c0fa59384743e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2021-03-04更新
|
2597次组卷
|
5卷引用:江苏省苏州市工业园区园区三中2019-2020学年高一下学期期中数学试题
江苏省苏州市工业园区园区三中2019-2020学年高一下学期期中数学试题(已下线)8.6空间直线、平面的垂直(2)(精炼)-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)吉林省白城市第一中学2020-2021学年高一下学期期中数学试题黑龙江省嫩江市第一中学校等五校2020-2021学年高一下学期期末考试数学试题江西省南昌市进贤县第一中学2020-2021学年高二下学期期中考试数学(文)试题
名校
解题方法
3 . 如图,三棱柱
的各棱的长均为2,
在底面上的射影为
的重心
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/599c6990-7e9a-4530-bd58-a98ab45d1d97.png?resizew=228)
(1)若
为
的中点,求证:
平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/599c6990-7e9a-4530-bd58-a98ab45d1d97.png?resizew=228)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07391ef575d28f09bc5cda0ff8130a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b2213b575a7cfaffcdf91885005c7d.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfcd4aa8e2e84c4605a84097167e216a.png)
您最近一年使用:0次
2021-02-03更新
|
1523次组卷
|
2卷引用:安徽省芜湖市2020-2021学年高三上学期期末文科数学试题
4 . 如图,在直角梯形
中,
,
,且
为
的中点,
,
分别是
,
的中点,将三角形=
沿
折起,则下列说法正确的是_____________ .(写出所有正确说法的序号)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/d9b80ef5-a186-4385-b0aa-8c3e76f4b7e2.png?resizew=233)
①不论
折至何位置(不在平面
内),都有
平面
;
②不论
折至何位置(不在平面
内),都有
;
③不论
折至何位置(不在平面
内),都有
;
④在折起过程中,一定存在某个位置,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479bb5e937f4fdb1fcbca229e62e0e80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c05986ad5fa244bc1aedf7b5d216544.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/d9b80ef5-a186-4385-b0aa-8c3e76f4b7e2.png?resizew=233)
①不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678b28fddb166d90878d24d6e5481080.png)
②不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c4a875c62b36bcc95d629b780d8ed4.png)
③不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7605ce6f221ce8cad191da0f84a216d0.png)
④在折起过程中,一定存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f7f37289eeb9721a6f3cbfd0d7708a.png)
您最近一年使用:0次
名校
解题方法
5 . 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:海南省海口市琼山中学2019-2020学年度高一年级下学期期中考试数学科试题
解题方法
6 . 如图,正方体
的棱长为1,点
分别为
中点.
![](https://img.xkw.com/dksih/QBM/2020/12/21/2619078486417408/2623820449767424/STEM/f681f803-5c58-494c-9a19-4f621356668f.png?resizew=283)
(1)求证:
平面
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0f067a2a348ceb24a408f82992eab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b0cacb00909cf845e316fc3a00829c.png)
![](https://img.xkw.com/dksih/QBM/2020/12/21/2619078486417408/2623820449767424/STEM/f681f803-5c58-494c-9a19-4f621356668f.png?resizew=283)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b8c2721ada247b03f41f328539b301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231673dd67ab79d3c5da73904ceade1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
您最近一年使用:0次
2020-12-28更新
|
1262次组卷
|
2卷引用:福建省2021届普通高中学业水平合格性考试(会考 )适应性练习数学试卷五试题
名校
解题方法
7 . 矩形ABCD中,
,P为线段DC的中点,将
沿AP折起,使得
.
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623074517852160/2623475375554560/STEM/26efc6e6-1f8c-4696-8bef-71777ab3d430.png)
(1)若E为BD的中点,证明:
平面ADP;
(2)证明:平面
平面ABCP.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9953b7b5c647641edbec4c2ab90a65f4.png)
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623074517852160/2623475375554560/STEM/26efc6e6-1f8c-4696-8bef-71777ab3d430.png)
(1)若E为BD的中点,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b77a5c3865855fbb3d24f9522ced8d.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在直三棱柱
中,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2020/12/2/2605617319919616/2609844218527744/STEM/32edbc27-071b-452a-9f4d-0fe9d9537288.png?resizew=219)
(1)求证:
平面
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/12/2/2605617319919616/2609844218527744/STEM/32edbc27-071b-452a-9f4d-0fe9d9537288.png?resizew=219)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0447e46f2d9b39960ae1f1294ed8a2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
您最近一年使用:0次
2020-12-08更新
|
1063次组卷
|
8卷引用:山西省康杰中学2017-2018学年高二上学期期中考试数学(文)试题
山西省康杰中学2017-2018学年高二上学期期中考试数学(文)试题广西南宁市马山县金伦中学2017-2018学年高一下学期“4+ N”高中联合体期末联考数学试题广西南宁市马山县金伦中学2017-2018学年高一下学期“4+ N”高中联合体期末联考数学试卷【校级联考】陕西省汉中中学2018-2019学年高二上学期期中考试数学试卷安徽省滁州市定远县民族中学2020-2021学年高二上学期11月月考数学(文)试题江西省宜春市高安中学2020-2021学年高二下学期期中考试数学(文)试题上海市洋泾中学2021-2022学年高二上学期期中数学试题(已下线)专题03直线与平面的位置关系(4个知识点6种题型)-【倍速学习法】2023-2024学年高二数学核心知识点与常见题型通关讲解练(沪教版2020必修第三册)
9 . 如图,在三棱柱
中,
、
、
分别是
、
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/b142edbb-8595-40a1-8593-46abfee3c835.png?resizew=228)
(1)证明:
平面
;
(2)底面△
是边长为2的正三角形,
在底面上的射影为
,且
,当
是
的中点时,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/b142edbb-8595-40a1-8593-46abfee3c835.png?resizew=228)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b91d1f9b781f31342eaaba08adb6553.png)
(2)底面△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1264a2e3609e1c274acb89b5ea5019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1371240a4e0846228225f8340d06621e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffb952f86442845da723fd291564484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ec28ea54930b806bca0961079f6e3.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,在四棱锥
中,底面四边形
满足
,
,
,且
为
的中点.
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516885956493312/2519768270356480/STEM/ea2a09701f964b69a83bb2a3427b53e0.png?resizew=203)
(1)求证:
平面
;
(2)若平面
平面
,且
,求证:平面
平面
.
![](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/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516885956493312/2519768270356480/STEM/ea2a09701f964b69a83bb2a3427b53e0.png?resizew=203)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f369bec2d5682bf6b8b317a08aff546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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2020-08-03更新
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7卷引用:山东省聊城市2019-2020学年高一(下)期末数学试题