如图,点O是直线
上的一点,射线
在直线
的上方且
,有一大小为
的
可绕其顶点O旋转一周,其中射线
分别平分
、
,当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45739116f428f7c6c5964de72a1fa101.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32b782e7a771d73360dd46e699e7e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36581140ebac5d28438ea63b1b23b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f65dbed884e2248ec075655c684aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35c73d1800c9e8da7708e810f1ef7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45739116f428f7c6c5964de72a1fa101.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/6b4b327d-8df6-4010-8ef8-45b1a55188e9.png?resizew=180)
22-23七年级上·湖北武汉·期末 查看更多[4]
湖北省武汉市黄陂区双凤中学2022-2023学年七年级上学期期末考试数学试题 湖北省武汉市黄陂区2022-2023学年七年级上学期期末数学试卷 (已下线)第4章 几何图形初步(单元测试·拔尖卷)-2023-2024学年七年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题6.37 平面图形认识(一)(全章分层练习)(培优练)-2023-2024学年七年级数学上册基础知识专项突破讲与练(苏科版)
更新时间:2023-01-09 15:22:17
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【推荐1】已知OC是∠AOB的平分线,∠BOD=
∠COD,OE平分∠COD,设∠AOB=β,则∠BOE=_____ .(用含β的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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【推荐2】如图,直线AB⊥OC于点O,∠AOP=40°,三角形EOF其中一个顶点与点O重合,∠EOF=100°,OE平分∠AOP,现将三角形EOF以每秒6°的速度绕点O逆时针旋转至三角形E′OF′,同时直线PQ也以每秒9°的速度绕点O顺时针旋转至P′Q′,设运动时间为m秒(0≤m≤20),当直线P′Q′平分∠E′OF′时,则∠COP′=___ .
![](https://img.xkw.com/dksih/QBM/2021/6/30/2753719781195776/2795957890031616/STEM/3ae3a5e3-df5e-4759-af33-3a50b26755c3.png)
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【推荐1】如图,直线
,点
分别在直线
上,点
为
之间一点,且点
在线段
的左侧,
.若
与
的平分线相交于点
与
的平分线相交于点
与
的平分线相交于点
,…,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c607c8e214caf7428f9ea5b0ac56c879.png)
__________ .(用含
的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
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【推荐2】如图所示,在△ABC中,BC=4,E,F分别是AB,AC的中点,动点P在直线EF上,∠CBP的平分线交CE于点Q,当点Q把线段EC分成的两线段之比是1:2时,线段EP、BP满足的数量关系是__________________________ .
![](https://img.xkw.com/dksih/QBM/2019/11/12/2332247278231552/2332527763570688/STEM/90643d56674c4b308d9b24d6cb0ca0f4.png?resizew=163)
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