已知
,
在
内部,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/4a8debb2-b96b-45ba-a5e6-9df001dd79ee.png?resizew=513)
(1)如图1,若
,求
的度数;
(2)如图2,若OE平分
,请说明:
;
(3)如图3,若在
的外部作
的余角
和
的余角
,试探究
,
和
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8052651082b1215593dafbf10e72b837.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/4a8debb2-b96b-45ba-a5e6-9df001dd79ee.png?resizew=513)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e0db02f267c14e901b006661838f0ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
(2)如图2,若OE平分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba040b73d8ad132ae1eb9cf0ac52b152.png)
(3)如图3,若在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3a3bf63440a2fdd769162516fb0e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a67367746e407d6ebb7b3b7bc2fba01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3a3bf63440a2fdd769162516fb0e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a67367746e407d6ebb7b3b7bc2fba01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c792f1d987afbefae1edd07daa7323.png)
更新时间:2024-01-21 19:45:04
|
相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】如图,点O是直线
上一点,以O为顶点作
,
平分
.
时,求
的度数;
(2)若
与
互补,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea7b811fa609b8e92da877471564e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,直线
,
相交于点O,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/656bbd00-b417-41c5-8513-dbfa7d57d870.png?resizew=143)
(1)试说明:
.
(2)若
平分
,求
的度数.
![](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/178e3fa2e4de57a4c067e79be7d798e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60380ca89b244ae59af6551b5fdf25be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/656bbd00-b417-41c5-8513-dbfa7d57d870.png?resizew=143)
(1)试说明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐3】如图,两个形状、大小完全相同的含有
、
的直角三角板如图①放置,
、
与直线
重合,且三角板
、三角板
均可绕点
逆时针旋转.
![](https://img.xkw.com/dksih/QBM/2020/2/8/2394812586565632/2395482852646912/STEM/357b810d05104d489189272cafbc98af.png?resizew=178)
(1)直接写出
的度数是______.
(2)如图②,在图①基础上,若三角板
的边
从
处开始绕点
逆时针旋转,转速为4.5度/秒,同时三角板
的边
从
处开始绕点
逆时针旋转,转速为0.5度/秒,(当
转到与
重合时,两三角板都停止转动),在旋转过程中,当
与
重合时,求旋转的时间是多少?
(3)在(2)的条件下,
、
、
三条射线中,当其中一条射线平分另两条射线的夹角时,请求出旋转的时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/2/8/2394812586565632/2395482852646912/STEM/ddd6491146a5470cb3bc261c733a9e0b.png?resizew=219)
![](https://img.xkw.com/dksih/QBM/2020/2/8/2394812586565632/2395482852646912/STEM/357b810d05104d489189272cafbc98af.png?resizew=178)
图① 图②
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f4ea9203ad9cd37c444cf1867c8746.png)
(2)如图②,在图①基础上,若三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(3)在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】 如图,已知AB⊥AC,AB=AC,DE过点A,且CD⊥DE,BE⊥DE,垂足分别为点D,E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/4203b94d-7d05-4c68-a1cf-dc44a721e957.png?resizew=200)
(1)∠DCA与∠EAB相等吗?说明理由;
(2)△ADC与△BEA全等吗?说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/4203b94d-7d05-4c68-a1cf-dc44a721e957.png?resizew=200)
(1)∠DCA与∠EAB相等吗?说明理由;
(2)△ADC与△BEA全等吗?说明理由.
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐2】如图,点A,O,B在一条直线上,
,
,OD是
的平分线.
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644528639713280/2646685327933440/STEM/ed76786e-9ed6-4936-a866-e172d4cc6f63.png?resizew=140)
(1)请直接写出
的余角和补角.
(2)求
和
的度数;
(3)OE是
的平分线吗?为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a94a3697e5685193cd3f68cd7964373.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4a3ec6dbc8fdc705e2b805410bc5e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644528639713280/2646685327933440/STEM/ed76786e-9ed6-4936-a866-e172d4cc6f63.png?resizew=140)
(1)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
(3)OE是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e1e2a60c37ebc303d4fc2bf3d6a234.png)
您最近一年使用:0次