如图1,把一副直角三角板的直角边
和
分别放在直线
上,两个三角板分别在直线
两侧,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/e851a94c-99b7-444f-85b7-dbcb0327c603.png?resizew=764)
(1)在图1中,
___________,
___________;
(2)如图2,
为射线,将三角板
绕点O旋转,使
的一边
恰好平分
.问:此时
是否平分
?请说明理由;
(3)将图2中的三角板
绕点O旋转至图3的位置,使
在
的内部.
①求
的度数;
②求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8da10b2137a1e87801556a313e625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c97d73a687d728eb0b265d389c5d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c02d487342eb3657dd14e9610176c3d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/e851a94c-99b7-444f-85b7-dbcb0327c603.png?resizew=764)
(1)在图1中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021bc0ff7e36c9d6d70ddd2e51e8c04c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e515787ebe97ed2662237d9ca51ea1.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c4ff9fc8518fa4829e39254d3f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571f8dfb1eb003438f27bab2324140ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4812da80614cabbb9f4b86468eaab17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
(3)将图2中的三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571f8dfb1eb003438f27bab2324140ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf7a961a55aa7f225fadb6a25a60c75.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c4f95cab640cb508268e621afe0758.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2197a1162e5da8f1f0034404d012ec6.png)
22-23七年级上·广东珠海·期末 查看更多[11]
广东省珠海市香洲区2022-2023学年七年级上学期期末考试数学试卷广东省珠海市2023-2024学年七年级上学期期末模拟数学试题(已下线)专题4.29 线与角中的旋转问题(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(北师大版)(已下线)专题4.30 线与角中的旋转问题(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(人教版)(已下线)专题6.33 线与角中的旋转问题(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)(已下线)专题4.7 动角旋转问题专项训练-2023-2024学年七年级数学上册举一反三系列(人教版)(已下线)专题4.7 动角旋转问题专项训练-2023-2024学年七年级数学上册举一反三系列(北师大版)(已下线)专题6.7 动角旋转问题专项训练-2023-2024学年七年级数学上册举一反三系列(苏科版)山西省临汾侯马市2023-2024学年七年级上学期期末数学试题(已下线)专题6.7 动角旋转问题专项训练-2023-2024学年七年级数学上册举一反三系列(浙教版)(已下线)专题4.7 动角旋转问题专项训练-2023-2024学年七年级数学上册举一反三系列(沪科版)
更新时间:2023-02-21 21:52:42
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】将一副三角板叠放在一起:
(1)如图1,在此种图案的情形下,如果
,求
的度数;
(2)如图2,在此种图案的情形下,
是否成立?若成立,请求出
的度数;若不成立,请说明理由.
(1)如图1,在此种图案的情形下,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f99b471458d77d903a54b5bbdecb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35803969509655f72b4118503ae1c966.png)
(2)如图2,在此种图案的情形下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b944e3ce755da7ec3fa71fc8a176154d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://img.xkw.com/dksih/QBM/2020/4/8/2437247774638080/2437604047405056/STEM/901b6a3b5e2843dda7fd2afae85e8147.png?resizew=313)
您最近一年使用:0次
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|
适中
(0.65)
【推荐2】如图1,以直线
上一点O为端点作射线
,使
.将一个直角三角板
的直角顶点O放在直线
上的点O处,边
放在射线
上.
__________;
(2)如图2,将直角三角板
绕点O按逆时针方向转动,当射线
恰好平分
时,求
的度数;
(3)如图3,将直角三角板
绕点O转动,如果
始终在
的内部,试猜想
和
有怎样的数量关系,并说明理由.
![](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/3c6af03c8bf883e83e61e18ddb83367c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1f08bd1651f93a4303cf3a3b822391.png)
(2)如图2,将直角三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
(3)如图3,将直角三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】已知
,
、
分别是
内部的两条射线.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/3a58f61c-de8c-4cd8-8ef7-a9220f936151.png?resizew=302)
(1)如图1,若
,
平分
,
为
内部的一条射线,
,求
的度数;
(2)如图2,若
、
分别平分
,
,且
,若
,求
和
的度数;
(3)如图3,
为射线
的反向延长线上一点,将射线
绕点O顺时针以
的速度旋转,旋转后
对应射线为
,旋转时间为
秒
,
平分
,
为
的三等分线,
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/3a58f61c-de8c-4cd8-8ef7-a9220f936151.png?resizew=302)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984a56d927fd7674da1f23d8fd1528e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509b37a7f1a18fcbb9613b79b0cc7609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0730ae99b38cf9785558e19a813d699f.png)
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(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fc6cf34323f80b94fe2a9d0867d62e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50a7b907d40deb06493c07567aa8ef2.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,在四边形ABCD中,∠A=∠CEB=90°,对角线BD平分∠ABC,且BD=BC,CE⊥BD于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/acbbdaad-c3ef-4938-9b2f-ebaa5a907b06.png?resizew=124)
(1)求证:△ABD≌△EBC;
(2)当∠ADB=60°时,求∠DCE的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/acbbdaad-c3ef-4938-9b2f-ebaa5a907b06.png?resizew=124)
(1)求证:△ABD≌△EBC;
(2)当∠ADB=60°时,求∠DCE的度数.
您最近一年使用:0次