名校
解题方法
1 . 如图所示,几何体
中,
是正三角形,
,
均与面
垂直,且
,点
、
分别在棱
、
上,满足
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/4aff93f7-04da-42a1-91d5-133bd6c8e11a.png?resizew=169)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1d97b95bccd80f06c3af864897da9a.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a798ddf34f0fed7cb1616228cc88936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65734b86acbb1df7057b72cbf6dcb4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/4aff93f7-04da-42a1-91d5-133bd6c8e11a.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9c68879985182b4de065c552cb8e31.png)
您最近一年使用:0次
2021-07-15更新
|
390次组卷
|
2卷引用:江西省景德镇一中2020-2021学年高二下学期期末数学(文)试题
名校
2 . 圆柱
中,
为圆
的直径,
、
、
都是圆柱
的母线,
.
![](https://img.xkw.com/dksih/QBM/2022/2/3/2908238868004864/2940484600758272/STEM/27f7ecddedec402ab3ac837ad964fc1c.png?resizew=206)
(1)求证
平面
;
(2)若
,求锐二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b46b2ff7904a600687703d536dd603.png)
![](https://img.xkw.com/dksih/QBM/2022/2/3/2908238868004864/2940484600758272/STEM/27f7ecddedec402ab3ac837ad964fc1c.png?resizew=206)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d8662513d307ed16683319e997494d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd943c914d3a080719c8fcda4b2cb3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8e82d52f3b44b7cd6b9f2cc1788e2e.png)
您最近一年使用:0次
解题方法
3 . 如图,在边长为2的正方体
中,点
为
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/9afd5e22-14e3-4ee5-a5c3-15ba35ff7f59.png?resizew=180)
(1)证明:
平面
;
(2)若
为侧面
内一点,且
平面
,求
的最小值.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554b3b4c5ce7aca81becc07ed4903736.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/9afd5e22-14e3-4ee5-a5c3-15ba35ff7f59.png?resizew=180)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808709d61dda984c341792168f67104f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f33fa5152ba27f7b8a28890cefca219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7f5d3a32de5e2f05c86d2e9cd94f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
解题方法
4 . 如图,在直四棱柱
中,
,
,
为
上一点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/f74a520e-e1e9-474d-a5b7-eb818ecc1655.png?resizew=164)
(Ⅰ)求证:
;
(Ⅱ)求证:
平面
;
(Ⅲ)设平面
与棱
交于点
,确定点
的位置,并求出线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ebb94a12d0c81342bec40928a0d6bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/f74a520e-e1e9-474d-a5b7-eb818ecc1655.png?resizew=164)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c897a54f2e36bc4b52fba74b41c89d2d.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
(Ⅲ)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8257b6bd25104e07b9ad935c0a3aac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次
解题方法
5 . 如图,在四棱锥
中,
,
,
,AB=AC=2,AE=ED=1.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/1b66493c-c26b-4f22-87d8-9c5efe2a5712.png?resizew=171)
(1)若F为AC中点,G为AB中点,
,求证:
平面BCD;
(2)若平面
平面ABC,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9045e6cd575bbe76c89ef6ef852fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7bd02e0adeae92ba9526261b1baf797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032b3e422eeb39cf649dffc9934a7cf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/1b66493c-c26b-4f22-87d8-9c5efe2a5712.png?resizew=171)
(1)若F为AC中点,G为AB中点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c97a7fab5d1550e2fef66772cc985fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5d62dcf1c173fe35595dfed43f9c87.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31effd1d3f7ce1f6e57be80c7f3af4ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9fac14c8330781420fa076b2e04e77.png)
您最近一年使用:0次
名校
6 . 如图,在四棱锥
中,底面
是菱形,
为
的中点,
为
的中点.证明:直线
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a5faf3cbb633fc4294c8ce703c64c3.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/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3201d3796ed9a29338aac25245a7c8e2.png)
您最近一年使用:0次
2017-12-03更新
|
970次组卷
|
7卷引用:北师大版 必修2 过关斩将 第一章 立体几何初步 §5 平行关系 5.1 平行关系的判定
19-20高二·浙江·期末
名校
7 . 如图所示四棱锥
中,
底面
,四边形
中,
,
,
,
,
为
的中点,
为
中点.
![](https://img.xkw.com/dksih/QBM/2020/3/5/2412911289155584/2412954668687360/STEM/a3dbb57fb4c84ffa84bec7b9146a0a4c.png?resizew=223)
(1)求证:
平面
;
(2)求直线
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5acb763021bf166ca719d07223591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81981fd7b343f4fe2db8f36eb66c1ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2412911289155584/2412954668687360/STEM/a3dbb57fb4c84ffa84bec7b9146a0a4c.png?resizew=223)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2020-03-05更新
|
477次组卷
|
4卷引用:云南省丽江市第一中学2020-2021学年高二上学期期末市统测模拟考试数学(理)试题
名校
8 . 如图,在直四棱柱
中,底面四边形
为梯形,点
为
上一点,且
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712443946426368/2751503424200704/STEM/69e30653-fa4b-4267-9015-e590f7fbfe3e.png?resizew=175)
(1)求证:
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b86cde4e24036082b9c92253a6f579e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd2f888f1b9d7f522e6248ce957a688.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712443946426368/2751503424200704/STEM/69e30653-fa4b-4267-9015-e590f7fbfe3e.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c8f2410d6a17adcf6817b08d20f3ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ded2e3fdcab984f3699972fc3ff75d5.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f0f42dd7ab21d2057ef8b7a1a640fd.png)
您最近一年使用:0次
2021-06-26更新
|
345次组卷
|
3卷引用:四川省遂宁市2021届高三三三模数学(理)试题
四川省遂宁市2021届高三三三模数学(理)试题(已下线)考点33 直线、平面平行的判定及其性质-备战2022年高考数学(理)一轮复习考点帮四川省内江市第六中学2021-2022学年高三上学期第一次月考数学(理科)试题
解题方法
9 . 如图,四边形ABED为梯形,
,
,
平面ABED,M为AD中点
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/accf8ca9-6beb-4077-bea1-579074d80c68.png?resizew=239)
(1)求证:平面
⊥平面PBM
(2)探究在PD上是否存在点G,使得
平面PAB,若存在求出G点,若不存在说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64afb6b912d42d3405d9be49521077d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785f57f0c40632925c12ac31fd27c4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/accf8ca9-6beb-4077-bea1-579074d80c68.png?resizew=239)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)探究在PD上是否存在点G,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1399e7ae0b2decaafc62a5cdffb15522.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,在三棱锥
中,
平面
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/3fcd7876-c63d-44fb-8bd0-873d2f6e1391.png?resizew=152)
(1)若
,
.求证:
;
(2)若
,
,
分别在棱
,
,
上,且
,
,
.求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/3fcd7876-c63d-44fb-8bd0-873d2f6e1391.png?resizew=152)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c71dbf267939080668be464f1aa60da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530f462e5ec1e58c46e1f7644d0cc21.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98de02d1d5b7ac04bce54be393218922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f68184ccf2ee70eb5b4f037f58fa06b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760e8882e84ecd68bc889a55efce5d03.png)
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4卷引用:山西省太原市2020-2021学年高一下学期期末数学试题
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