【感知探究】如图①,已知,
,点
在
上,点
在
上.求证:
.
【类比迁移】如图②,
、
、
的数量关系为 .(不需要证明)
【结论应用】如图③,已知
,
,
,则
°.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/bf46f963022ed42d3cc9c5ef8d135c13.png)
【类比迁移】如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4dd47d838804e49cc5bec8db349d1f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/181126650123d234913d8ffba7823d95.png)
【结论应用】如图③,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd81adb13f5a7550b0f94f770900a613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114a43fd02a222d89e868b0d1595d480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386cda9f96731510d52ec18199e18286.png)
23-24七年级上·吉林长春·期末 查看更多[12]
吉林省长春市朝阳区2023-2024学年七年级上学期期末数学试题(已下线)专题5.28 相交线与平行线常见几何模型(知识梳理与考点分类讲解)-2023-2024学年七年级数学下册基础知识专项突破讲与练(人教版)(已下线)专题7.29 平行线中常见几何模型(知识梳理与考点分类讲解)-2023-2024学年七年级数学下册基础知识专项突破讲与练(苏科版)广东省广州市花都区和兴学校2023-2024学年八年级上学期期中数学试题(已下线)专题2.26 相交线与平行线常见几何模型(知识梳理与考点分类讲解)-2023-2024学年七年级数学下册基础知识专项突破讲与练(北师大版)河北省保定市易县白马中学2023-2024学年七年级下学期月考数学试题(已下线)第二章第02讲 平行线的判定和性质(10类热点题型讲练)-【帮课堂】2023-2024学年七年级数学下册同步学与练(北师大版)(已下线)第二章第03讲 解题技巧专题:平行线中有关拐点的模型专题问题(4类热点题型讲练)-【帮课堂】2023-2024学年七年级数学下册同步学与练(北师大版)(已下线)考题猜想01 平面图形的认识(二)(培优必刷50题19种题型)-2023-2024学年七年级数学下学期期中考点大串讲(苏科版)(已下线)考题猜想1-1 平面图形的认识(二)(压轴题,平行线的七大经典模型+三角板拼接问题)-2023-2024学年七年级数学下学期期末考点大串讲(苏科版)(已下线)专题03 平行线中的拐点问题期末真题汇编【五大模型+优选提升题】-备战2023-2024学年七年级数学下学期期末真题分类汇编(人教版)(已下线)暑假作业04 平行线模型及动态问题-【暑假分层作业】2024年七年级数学暑假培优练(北师大版)
更新时间:2024-03-05 16:17:31
|
【知识点】 根据平行线判定与性质求角度解读
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】在三角形ABC中,点D在线段AC上,ED
BC交AB于点E,点F在线段AB上(点F不与点A,E,B重合),连接DF,过点F作FG⊥FD交射线CB于点G.
(1)如图1,点F在线段BE上,用等式表示∠EDF与∠BGF的数量关系,并证明;
(2)如图2,点F在线段BE上,求证:∠ABC+∠BFG-∠EDF=90°;
(3)当点F在线段AE上时,依题意,在图3中补全图形,请直接用等式表示∠EDF与∠BGF的数量关系,不需证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(1)如图1,点F在线段BE上,用等式表示∠EDF与∠BGF的数量关系,并证明;
(2)如图2,点F在线段BE上,求证:∠ABC+∠BFG-∠EDF=90°;
(3)当点F在线段AE上时,依题意,在图3中补全图形,请直接用等式表示∠EDF与∠BGF的数量关系,不需证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/d98b7759-dcfb-4bce-a1c4-37f87eafad46.png?resizew=572)
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解答题-问答题
|
适中
(0.65)
【推荐2】已知
,
.
(1)如图1,若点
落在
上,且
,则
的度数为______;
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729419504181248/2793026728361984/STEM/90700e04-0595-468d-906b-519f67110720.png)
(2)如图2,点
落在
与
之间,且两边分别与
,
相交.
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729419504181248/2793026728361984/STEM/dbfdc88e-bce7-470f-9bab-4fc7793763e6.png)
①若
,则
的度数为______,你能发现
与
之间的关系吗?直接写出结果;
②若改变
的度数,①中的结论是否还成立?如果成立,请推理说明;如果不成立,请说明理由.
③如图3,作
与
的平分线交于点
,再作
与
的平分线交于点
,…,以此类推,作
次,请直接写出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add60595ecea5d00ff1fbb2a5409be73.png)
(1)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd378d3805a3d8295aec88bf3684f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6500fbe1ea4a372d703502699b809e.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729419504181248/2793026728361984/STEM/90700e04-0595-468d-906b-519f67110720.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729419504181248/2793026728361984/STEM/dbfdc88e-bce7-470f-9bab-4fc7793763e6.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546804191f97b80feebd5c961e3b0afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277d9a4801bbe2b97e781099e72ffc6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2407694babd974243443463210d09aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277d9a4801bbe2b97e781099e72ffc6b.png)
②若改变
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2407694babd974243443463210d09aa.png)
③如图3,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2407694babd974243443463210d09aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277d9a4801bbe2b97e781099e72ffc6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e348dd870dee96f3647cf6669d693c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/016707eac7542d695a77eca9760eca01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151e5633a5d0cc30b254167e3dda5803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6668b74aa85d8b83fb1dad304c8925b7.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729419504181248/2793026728361984/STEM/b0a8eb79-318f-46e6-8d35-f130bdb9eec7.png)
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