已知:
在
的内部,且
,
,射线
平分
,
.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/47d81b07-d96e-4810-955f-5ce777459abb.png?resizew=165)
(1)
的度数;
(2)
的度数.
![](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/9fda71562f4f7207ad317e6ce37a8566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564be9cb89307fa4342392f4a1b922b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fc92b6a868e1ce6f0c5c8d38f71006.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/47d81b07-d96e-4810-955f-5ce777459abb.png?resizew=165)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
更新时间:2023-01-04 21:10:07
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,以直线
上一点
为端点作射线
,使
,将一个直角三角形的直角顶点放在点
处.(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/65dac5a1-c913-4913-8bdb-b1fd747c5fee.png?resizew=456)
(1)如图①,若直角三角板
的一边
放在射线
上,则
________°;
(2)如图②,将直角三角板
绕点
逆时针方向转动到某个位置,若
恰好平分
,求
的度数;
(3)如图③,将直角三角板
绕点
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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76cc7fec25d61981c418248e5e933cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95a92fcd0cd5e55f1d32d42504a5690.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/65dac5a1-c913-4913-8bdb-b1fd747c5fee.png?resizew=456)
(1)如图①,若直角三角板
![](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/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/1dde8112e8eb968fd042418dd632759e.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/1dde8112e8eb968fd042418dd632759e.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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适中
(0.65)
【推荐2】如图,已知∠AOB=90
,射线OC绕点O从OA位置开始,以每秒4
的速度顺时针方向旋转;同时,射线OD绕点O从OB位置开始,以每秒1
的速度逆时针方向旋转. 当OC与OA成180
时,OC与OD同时停止旋转.
![](https://img.xkw.com/dksih/QBM/2020/5/15/2463364552720384/2463479127760896/STEM/8f05937c2bba4c72a82df6b5a57d6323.png?resizew=148)
(1)当OC旋转10秒时,∠COD=___.
(2)当OC与OD的夹角是30
时,求旋转的时间.
(3)当OB平分∠COD时,求旋转的时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a02295b56d4f94521133b91e1403e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a02295b56d4f94521133b91e1403e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a02295b56d4f94521133b91e1403e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a02295b56d4f94521133b91e1403e4.png)
![](https://img.xkw.com/dksih/QBM/2020/5/15/2463364552720384/2463479127760896/STEM/8f05937c2bba4c72a82df6b5a57d6323.png?resizew=148)
(1)当OC旋转10秒时,∠COD=___.
(2)当OC与OD的夹角是30
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a02295b56d4f94521133b91e1403e4.png)
(3)当OB平分∠COD时,求旋转的时间.
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解答题-问答题
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适中
(0.65)
【推荐1】如图,直线
相与
相交于O,
分别是
,
平分线.
的两个补角;
(2)若
.求
和
的度数;
(3)试问射线
与
之间有什么特殊的位置关系?为什么?
![](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/5faca03dd3d2b7cc37f4c7c3aad7783e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8e171ac85cbccc8223a0cb5bc8bde3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2557547eecdc826b8282058802d217.png)
(3)试问射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】综合探究
在课堂上我们学习了平行线的性质,平行线具有“等角转化”的功能,“三线八角”图是研究平行线性质的“基本图形”.
,点E,F分别为直线
上的一点,点P为平行线间一点,猜想
,
与
之间的关系,并说明理由,阅读并补充下面推理过程:
解:
.理由如下:过点P作
.
,
______(两直线平行,内错角相等).
,
,
(______).
(两直线平行,内错角相等).
,即
.
(2)方法运用:如题2图,
,猜想
,
与
之间的关系,并说明理由.
(3)深化拓展:如题3图,
,
与
的角平分线相交于点Q.
①若
,
,
,直接写出
的度数.
②若
,
,
,求
的度数(用含m,n的代数式表示).
在课堂上我们学习了平行线的性质,平行线具有“等角转化”的功能,“三线八角”图是研究平行线性质的“基本图形”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b79c80cc81b5446dfac3ee97b03c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9b4a78c3b85dafdaec2e4e6dc87bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/431bd1ab475f5c7936a3b45b317abe99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19a0383ba99f036177eb8cd03bc709e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6cc9f041724e7fa6b08c717de02fc9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa44be61c0ac2ca6a67cb773cd8d0b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ba1e2af5c5d527fa77b9a3b175e5e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa44be61c0ac2ca6a67cb773cd8d0b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a356dc4e1742a07f100cc179e18551e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c1076691fe7717ac3e2ebbf62e818d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea574c335e1d98d3dddb3a9fd2b779a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19a0383ba99f036177eb8cd03bc709e.png)
(2)方法运用:如题2图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9b4a78c3b85dafdaec2e4e6dc87bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/431bd1ab475f5c7936a3b45b317abe99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
(3)深化拓展:如题3图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9b4a78c3b85dafdaec2e4e6dc87bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/431bd1ab475f5c7936a3b45b317abe99.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2903a19fe16b9de1fd0531df1d8261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f28625baa6e6f4367ab9214e3f38dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50cc08cfd8e036a6728c71b2c5bfcdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e0a272aa29c4531aac22f28c64baf5.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d4d9ecff7037c52836e1a245c04b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7504f2542431d99d2a1b70f57345becc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85e633ef2d5b53ccc8a424e0d8e8b70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e0a272aa29c4531aac22f28c64baf5.png)
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