如图,已知
,
、
分别在
、
上,点
在
、
之间,连接
、
.
,
平分
,
平分
时:
①如图1,若
,求
的度数;
②如图2,在
的下方有一点
,
平分
,
平分
,求
的度数;
(2)如图3,在
的上方有一点
,若
平分
.线段
的延长线平分
,则当
时,请直接写出
与
的数量关系.(用含
的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.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/9d78abbad68bbbf12af10cd40ef4c353.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/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50293cd1c309723e804b0cff852ac81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50cf5d8784e1c3f5132a7915010c1be5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ee4e24fdbe22a139a9dee636f76182.png)
①如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77c41f4dd9ea0e98c819ee865fb701d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
②如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20e7f536e1d4be86215aa478f654edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b32929d560220c144c34f413558377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283aa5ac0769cfdc5fb0d130c864e8a6.png)
(2)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d9beccf1e6e0435fed49aafe50649b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04be5179f428459df4f63c9c5d7dc7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ecaa611ec69d72200af7726800c518.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04be5179f428459df4f63c9c5d7dc7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2332c0698d463d56f4a31546231fd034.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
22-23七年级下·重庆江津·期中 查看更多[6]
重庆市江津区双福育才中学2022-2023学年七年级下学期期中数学模拟试题江苏省南通市2023-2024学年七年级下学期第一次月考数学试题(已下线)期中押题卷(一)(考试范围:北师大版第1~3章)-【好题汇编】备战2023-2024学年七年级数学下学期期中真题分类汇编(北师大版)(已下线)专题02 相交线与平行线压轴题专项训练梳理-【好题汇编】2023-2024学年七年级数学下学期期中真题分类汇编(广东专用)重庆市求精中学校2023-2024学年七年级下学期期中数学试题重庆市第九十四中学2023-2024学年下学期七年级4月月考数学试题
更新时间:2024-02-28 15:39:07
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】【阅读材料】
在“相交线与平行线”的学习中,有这样一道典型问题:
如图①,AB∥CD,点P在AB与CD之间,可得结论:∠BAP+∠APC+∠PCD=360°.
过点P作PQ∥AB.
∴∠BAP+∠APQ=180°.
∵AB∥CD,
∴PQ∥CD.
∴∠PCD+∠CPQ=180°.
∴∠BAP+∠APC+∠PCD
=∠BAP+∠APQ+∠CPQ+∠PCD
=180°+180°
=360°.
(1)如图②,AB∥CD,点P在AB与CD之间,写出∠BAP,∠APC,∠PCD间的等量关系;(只写结论)
(2)如图③,AB∥CD,点P,E在AB与CD之间,AE平分∠BAP,CE平分∠DCP.写出∠AEC与∠APC间的等量关系,并说明理由;
(3)如图④,AB∥CD,点P,E在AB与CD之间,∠BAE=
∠BAP,∠DCE=
∠DCP,写出∠AEC与∠APC间的等量关系.(只写结论)
在“相交线与平行线”的学习中,有这样一道典型问题:
如图①,AB∥CD,点P在AB与CD之间,可得结论:∠BAP+∠APC+∠PCD=360°.
过点P作PQ∥AB.
∴∠BAP+∠APQ=180°.
∵AB∥CD,
∴PQ∥CD.
∴∠PCD+∠CPQ=180°.
∴∠BAP+∠APC+∠PCD
=∠BAP+∠APQ+∠CPQ+∠PCD
=180°+180°
=360°.
(1)如图②,AB∥CD,点P在AB与CD之间,写出∠BAP,∠APC,∠PCD间的等量关系;(只写结论)
(2)如图③,AB∥CD,点P,E在AB与CD之间,AE平分∠BAP,CE平分∠DCP.写出∠AEC与∠APC间的等量关系,并说明理由;
(3)如图④,AB∥CD,点P,E在AB与CD之间,∠BAE=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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解答题-问答题
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名校
【推荐2】已知
,OC为
内部的一条射线,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/28cef5db-80c0-4177-8527-567db150a7d4.png?resizew=464)
(1)如图1,若OE平分
,OD为
内部的一条射线,
,求
的度数;
(2)如图2,若射线OE绕着O点从OA开始以15度/秒的速度顺时针旋转至OB结束、OF绕着O点从OB开始以5度/秒的速度逆时针旋转至OA结束,运动时间t秒,当
时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e847513a54d0e5a8433f583767ccaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36c0d4e38748fbb4a6cf5e700e5e874.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/28cef5db-80c0-4177-8527-567db150a7d4.png?resizew=464)
(1)如图1,若OE平分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec6a05ff1ff83f38709ec33bc4a4c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
(2)如图2,若射线OE绕着O点从OA开始以15度/秒的速度顺时针旋转至OB结束、OF绕着O点从OB开始以5度/秒的速度逆时针旋转至OA结束,运动时间t秒,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452b86e0dc0dc4d2d6d524a358b15fdb.png)
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解答题-作图题
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较难
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名校
【推荐1】如图1,将一副三角板中的两个直角顶点
叠放在一起,其中
,
,
.
与
的数量关系是 ;
与
的数量关系是 ;
(2)类比探究,若按住三角板
不动,顺时针绕直角顶点
转动三角形
,试探究当
等于多少度时
,画出图形并简要说明理由;
(3)拓展应用,若
,求
的度数;并直接写出此时
与
的位置关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb0c658231f83910d74dd2928a0ec9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
(2)类比探究,若按住三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28971fe3e3f9d3849400e98b46fc3ba.png)
(3)拓展应用,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eadd3d73eee3c3d89b7b197700f7e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解答题-作图题
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名校
【推荐2】平面内有两个锐角
与
,点B在直线
的上方.
保持不动,且
的一边
,另一边
与直线
相交于点F.
,
,且位置如图1,当点E,O,D在同一条直线上(即点O与点F重合)时,
________°;
(2)若
,
,
,当点E,O,D不在同一条直线上,画出图形并求
的度数(用含α,β的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836ea820cf3732508cdd332ceb9395ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836ea820cf3732508cdd332ceb9395ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836ea820cf3732508cdd332ceb9395ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829e19bd18d460db62dffcef85acba01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c211a24e544ded208ea0a2a2aa59bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e256db728a4b3c484bfb96894c8ef05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7c903121c158dafe5e7f3712897ed8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec6ce73c6786d50028addff089bbb64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20d85dc8bb5634f7d410b32b253a1de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c467e4c3d87e68396895cae1a1c18ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
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