如图,在矩形ABCD中,AB=3,AD=6,点E,F分别在AD,BC上,且AE=1,BF=4,沿EF将四边形AEFB折成四边形
,使点
在平面CDEF上的射影H在直线DE上.
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021809621598208/3023180391415808/STEM/6fa6b0f1fda7492981eea438bfb4c7b3.png?resizew=194)
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021809621598208/3023180391415808/STEM/3ce29383805b4c36adda86f7ef791ab2.png?resizew=181)
(1)求证:平面
⊥平面
;
(2)求证:
∥平面
;
(3)求直线HC与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb108d23658bd96d4c7902650e94c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021809621598208/3023180391415808/STEM/6fa6b0f1fda7492981eea438bfb4c7b3.png?resizew=194)
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021809621598208/3023180391415808/STEM/3ce29383805b4c36adda86f7ef791ab2.png?resizew=181)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7f857869bc6084d128e8c13f5c115c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/537b57d0545c86ff1861810439064644.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14d8820bcadc765f557d88c0d081b5c.png)
(3)求直线HC与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22163a4f67e22f33cbaff2b9a3910002.png)
2021高三·全国·专题练习 查看更多[6]
(已下线)大题专项训练15:立体几何(线线角、线面角)-2021届高三数学二轮复习(已下线)第三章《空间向量与立体几何》章节复习巩固(基础练+提高练)-2021-2022学年高二数学同步训练精选新题汇编(人教A版选修2-1)辽宁省部分中学2021-2022学年高三下学期期末数学试题重庆实验外国语学校2022-2023学年高二上学期九月检测数学试题湖北省十堰市东风高级中学2021-2022学年高二下学期期中数学试题(已下线)专题1.13 空间向量与立体几何全章综合测试卷-提高篇-2022-2023学年高二数学举一反三系列(人教A版2019选择性必修第一册)
更新时间:2022-07-15 16:59:09
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知在三棱锥
中,底面是边长为2的正三角形,
分别是棱
的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/9/ca9e8e8d-b84b-405d-82f5-0d2dd4748dd5.png?resizew=173)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
平面
;
(2)若平面
平面
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28094e9e4fc1b87c7c85abda1617d2bc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/9/ca9e8e8d-b84b-405d-82f5-0d2dd4748dd5.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
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解题方法
【推荐2】如图,在四棱锥
中,
平面
,且四边形
为正方形,点
,
,
分别为
,
,
的中点,点
为
上的动点.
![](https://img.xkw.com/dksih/QBM/2021/7/19/2767463562379264/2775471327019008/STEM/acc7ea7174a843639532530634a869ba.png?resizew=335)
(1)证明:
平面
.
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fb5257bb609ce623322103a5b4c2fb.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://img.xkw.com/dksih/QBM/2021/7/19/2767463562379264/2775471327019008/STEM/acc7ea7174a843639532530634a869ba.png?resizew=335)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b766876252d16f2e331ef2893d45cf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013e58ab92ebfc889e2e0e2be903792e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013e58ab92ebfc889e2e0e2be903792e.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
解题方法
【推荐3】如图,在三棱锥
中,
平面
,
,
,
为
的中点,
为
中点.求证:
![](https://img.xkw.com/dksih/QBM/2020/8/12/2526501112553472/2529136674562048/STEM/a7c7c525-ef7d-4f62-9daf-b938849b9b9d.png?resizew=265)
(1)
;
(2)
平面
.
![](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/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a41ada2c69a8c4ff1c0a9c780d2a08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/8/12/2526501112553472/2529136674562048/STEM/a7c7c525-ef7d-4f62-9daf-b938849b9b9d.png?resizew=265)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bc5d8308a060d6068cfc9f69fe79e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c286b3a80ba3274e32913f5178afe3bf.png)
您最近一年使用:0次
解答题-证明题
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适中
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解题方法
【推荐1】如图,在四棱锥
中,
⊥平面
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a936cb116989dedc2086134b37d027a5.png)
![](https://img.xkw.com/dksih/QBM/2020/10/19/2574236497821696/2574283769159680/STEM/139f8120-56df-4c29-a0e0-acf9dbbdd39d.png?resizew=247)
(1)求证:
平面
;
(2)设平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
平面
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a936cb116989dedc2086134b37d027a5.png)
![](https://img.xkw.com/dksih/QBM/2020/10/19/2574236497821696/2574283769159680/STEM/139f8120-56df-4c29-a0e0-acf9dbbdd39d.png?resizew=247)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66854bb5784c29a27075e884e10e392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebae74545340ce6971f437d129e9c659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24caeb80a748bcbc9dc33cd430a5aca.png)
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【推荐2】如图所示,正方形
所在平面与梯形
所在平面垂直,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967029701550080/2967856315375616/STEM/a6636002499f46adb82cac4ff2114e28.png?resizew=257)
(1)证明:
平面
;
(2)在线段
上是否存在一点
,使得平面
,平面
的夹角的余弦值为
,若存在求出
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02b1139e07e431b5d4276757b232bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec853fb315a3c7ce3699bc4ca0d74f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82c6b405f313256003750ffceadd042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048c053ec9544bb287a89322508ca1bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f53ada78ee7339a2fa0f4d09c3e624.png)
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967029701550080/2967856315375616/STEM/a6636002499f46adb82cac4ff2114e28.png?resizew=257)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7c261740ac2ae26715e1298ca278a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5faa864e27af897fe78edeea5e1f0bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430833bedfd2eef19d20648cd6e6676e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0575326fe48bfd6a08298998175e959.png)
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【推荐1】如图所示,在
中,
,
为
边上一点,且
,
平面
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/d47bcee9-b7d5-4ed0-9413-4453c41400f9.png?resizew=175)
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6baf49925a5bcb359b542d45067c81.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/882ecbc9b477dd66e7a918f65f75ed52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a0788d6f6f27ffe836f229287fb319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9039442b8c449e4555e095024cc9fefc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/d47bcee9-b7d5-4ed0-9413-4453c41400f9.png?resizew=175)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf126cfed85fa9b7720ec6f7b0008dc.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4739afd7311501e948aa4e1e5c1cb17.png)
您最近一年使用:0次
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适中
(0.65)
【推荐2】如图所示,直三棱柱
中,
是边长为2等边三角形,
是
的中点.
(1)求证:
平面
;
(2)若
与平面
所成角为
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca43c6d158c63be017c0637eaaecb2bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b899be3c4709ec661d84392b167230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/336df647-4d72-4c7a-987e-aefaa49ce482.png?resizew=180)
您最近一年使用:0次