如图1,在边长为2的菱形
中,
于点
,将
沿
折起到
的位置,使
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/f4f0e85b-908e-4ce5-99c5-1365db5370a9.png?resizew=363)
(1)求证:
平面
;
(2)在线段
上是否存在点
,使平面
平面
?若存在,求
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33dd782f4e4b319e07cd1a52b13be910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2bc5547bb6d2a7a315962ff75f6ba8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b6ec172ef78d77a7756705ebdc4f963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f5da94b932fc7e4029036f46c2d252.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/f4f0e85b-908e-4ce5-99c5-1365db5370a9.png?resizew=363)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82df335aec439a710ea30c94c466b779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e87df30dbc6856d2a260dc4b01d281a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3b36eb5bde9c25e732f560aa50e296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747978ec67fee6ee9eb07d02b80987d7.png)
22-23高二上·安徽安庆·阶段练习 查看更多[4]
安徽省安庆市第一中学2022-2023学年高二上学期测验(二)数学试题(已下线)6.3.2 空间线面关系的判定(练习)-2022-2023学年高二数学同步精品课堂(苏教版2019选择性必修第二册)(已下线)6.3.2空间线面关系的判定(2)(已下线)第05讲 1.4.1 用空间向量研究直线、平面的位置关系(2)
更新时间:2022-10-25 09:12:55
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图所示,在三棱锥S
ABC中,
,O为BC的中点.
(1)求证:
面ABC;
(2)求异面直线
与AB所成角的余弦值;
(3)在线段
上是否存在一点
,使二面角
的平面角的余弦值为
;若存在,求
的值;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f9938bf8667be57a98790ca477d46f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d30637da200a07672ae231b4c5c09cd.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd9bd54c25b35857e6b602291f9b6062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83303d3784492506fc44f2b4d6b07bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad69dc83ceaab3a18d6da6e054dc5b77.png)
![](https://img.xkw.com/dksih/QBM/2010/5/26/1569747543506944/1569747548790784/STEM/4d72c15f5f604fc2b7098c9fc785807a.png?resizew=240)
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【推荐2】如图,在三棱锥P-ABC中,PA=PB=AB=2,BC=3,∠ABC=90°,平面PAB⊥平面ABC,D、E分别为AB、AC中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/1/726dd93d-b665-4005-a50f-5173822377c7.png?resizew=194)
(1)求证:
平面PBC;
(2)求证:AB⊥PE;
(3)求二面角A-PB-E的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/1/726dd93d-b665-4005-a50f-5173822377c7.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7440b41636c761b0910639e310ff7dfb.png)
(2)求证:AB⊥PE;
(3)求二面角A-PB-E的大小.
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【推荐1】如图,四棱台
中,上、下底面均是正方形,且侧面是全等的等腰梯形,
,
分别为
的中点,上下底面中心的连线
垂直于上下底面,且
与侧棱所在直线所成的角为
.
(1)求证:
∥平面
;
(2)求点
到平面
的距离;
(3)边
上是否存在点
,使得直线
与平面
所成的角的正弦值为
,若存在,求出线段
的长;若不存在,请说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d134433600df75f2a5d0f35deb2cac90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ced9844fe2e052c70486af0740afa63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0a4f38420bb9215dbc9c875b755838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0a4f38420bb9215dbc9c875b755838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/0057a024-50ff-4829-ba70-d50596cf58d9.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff3ccea5989c60e51e321af3f53f54.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff3ccea5989c60e51e321af3f53f54.png)
(3)边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff3ccea5989c60e51e321af3f53f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d9662368fd788afb77b79035cdd268b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
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解题方法
【推荐2】如图所示,正方形
与矩形
所在平面互相垂直,
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/6ffc5525-a923-4210-8bfe-07d7686d48fc.png?resizew=174)
(1)求证:
平面
.
(2)在线段
上是否存在点
,使二面角
的平面角的大小为
?若存在,求出
的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7253ffd3fc633d861810ee2e872188b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/6ffc5525-a923-4210-8bfe-07d7686d48fc.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7542b49ab149f2be8ba6b48392bef1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d46c158824d9d1cc8eb3bcddbecbec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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解答题-问答题
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适中
(0.65)
【推荐3】如图,在四棱柱
中,四边形ABCD是一个边长为2的菱形,
,侧棱
⊥平面ABCD,
.
(1)求平面
与平面
的夹角的余弦值.
(2)设E是
的中点,在线段
上是否存在一点P,使得
平面PDB?若存在,请求出的
值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50943279ee6f0299b3725eecd77bafd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/4280274e-3e1f-4116-8b13-476c82a7464d.png?resizew=162)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64469646786964b5bcdb43398f4f94e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da225bc0a37378ef43131daaae8bcf7.png)
(2)设E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c597ff77c65c5add6f50294e3eee9536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554b3b4c5ce7aca81becc07ed4903736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ae72f5e5891249caa10c43224da89c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c72cd74713d764fb5e8baf69de7b78.png)
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