1 .
(1)请用文字语言叙述异面直线的判定定理;
(2)把(1)中的定理写成“已知:...,求证:...”的形式,并用反证法证明.
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名校
2 . 给定不共面的4点,作过其中3个点的平面,所有4个这样的平面围成的几何体称为四面体(如图所示),预先给定的4个点称为四面体的顶点,2个顶点的连线称为四面体的棱,3个顶点所确定的三角形称为四面体的面.求证:四面体中任何一对不共顶点的棱所在的直线一定是异面直线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/7591e2f1-42ef-474b-ae38-6e946dfe7429.png?resizew=151)
(1)请你用异面直线判定定理证明该结论;
(2)请你用反证法证明该结论.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/7591e2f1-42ef-474b-ae38-6e946dfe7429.png?resizew=151)
(1)请你用异面直线判定定理证明该结论;
(2)请你用反证法证明该结论.
您最近一年使用:0次
2022高三·全国·专题练习
解题方法
3 . 如图,在棱长为2的正方体
中,
,
分别是棱
、
的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/9/2890852519501824/2893539640451072/STEM/095f9190ca394bbd806b306474b6f8ac.png?resizew=202)
(1)求异面直线
与
所成角的大小;
(2)连接
,与
交于点
,点
在线段
上移动.求证:
与
保持垂直;
(3)已知点
是直线
上一点,过直线
和点
的平面交平面
于直线
,试根据点
的不同位置,判断直线
与直线
的位置关系,并证明你的结论.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2022/1/9/2890852519501824/2893539640451072/STEM/095f9190ca394bbd806b306474b6f8ac.png?resizew=202)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1b066f8869d0ff4513f7a99745125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8035fc825a001d7d9a3dacd8271662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
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2023高三·全国·专题练习
4 . 在异面直线
中的每一条上各取两个点,
.求证:
与
和
与
为两对异面直线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb353264ea3008dcda61415cd2a60ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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2023高三·全国·专题练习
5 . 已知直线
上有两点
,直线
上有一点
,若
同垂直于
,求证:直线
与
必为异面直线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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2024高三·全国·专题练习
解题方法
6 . 如图,
是棱长为2的正方体,
为面对角线
上的动点(不包括端点),
平面
交
于点
,
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/34ac1890-fe85-44bd-8c07-c86a81a0a607.png?resizew=158)
(1)试用反证法证明直线
与
是异面直线;
(2)设
,将
长表示为
的函数
,并求此函数的值域;
(3)当
最小时,求异面直线
与
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7442b64b37f685bc3ae88ff450c1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee50a23604ea2a9c1f3649dab97c2e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/34ac1890-fe85-44bd-8c07-c86a81a0a607.png?resizew=158)
(1)试用反证法证明直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8711eddf26d11fc974dfb6da4b640918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
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2024高三·全国·专题练习
7 . 已知直线
为异面直线,且
与
不相交,求证:
为异面直线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f880e93459a7f3743063f23ae705949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
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8 . 已知P为
所在平面外一点,
,
,E,F分别是PA和BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/46ad5acd-8377-4684-985e-a79570f3cd18.png?resizew=173)
(1)求证:EF与PC是异面直线;
(2)求EF与PC所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e4b16c2c6c9bd089da78122e9d2511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02aae3ca1fa1075fa53664736707716e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/46ad5acd-8377-4684-985e-a79570f3cd18.png?resizew=173)
(1)求证:EF与PC是异面直线;
(2)求EF与PC所成的角.
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2023高三·全国·专题练习
9 . 已知正方体
的棱长为2,点
是棱
的中点.求证:
与
是异面直线.
![](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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becf2941e15d668d93ea6ed980afd0ba.png)
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10 . 已知直线a,b,c,平面α,β满足
,
,
,
,
,求证:
,
是异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73d51665f7e628b34b4cb5e637222e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5475e10ea3f37788e680395999037a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4a7d41da69acabfc54f9b222b240b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7189f320feab59bfe55cf0d0b3a29e94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15234cbaac1f69fabb0abebda7709092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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2023-07-08更新
|
143次组卷
|
3卷引用:4.5空间中直线与直线的位置关系