(1)如图,
的外角
和
的平分线交于点F.用等式表示
与
的数量关系;
(2)如图,
的平分线和
的外角
的平分线交于点H.用等式表示
与
的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bc8e50eeccced1d7f3bc52e09a7d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/24/9ecebe09-5345-4c8b-a11f-34b88eb7934e.png?resizew=96)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d890499dca9a8ef30addafe41d6e771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9c1e0c3cab6b7bb3229221f4310ab0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/24/ff1e0376-b006-42b9-a4ca-b49d97eb167a.png?resizew=120)
更新时间:2023-10-21 21:53:30
|
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,已知
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绕点B按逆时针方向旋转一定的角度后得到
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恰好经过点A,设
与
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解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图,△ABC中,D是BC延长线上一点,E是CA延长线上一点,F是AB上一点,连接EF.求证:∠ACD>∠E.
![](https://img.xkw.com/dksih/QBM/2018/12/6/2091185515036672/2093294673854464/STEM/4fe2b8135d994c2d84083285477ef3b4.png?resizew=137)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】如图,已知在
中,
、
的外角平分线相交于点
,若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d531fa428397da03882b2873840da2bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2da2e28a1a69bff68017afc9fe1a85d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec412ebd940d71b983ce4877e3401ee.png)
![](https://img.xkw.com/dksih/QBM/2019/6/10/2222630796992512/2222728189337600/STEM/fa48ebe81ad044f1958a64a997c4175c.png?resizew=132)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】在
中,
.
(1)如图1,
、
的平分线相交于点O,求
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(2)如图2,
的外角
、
的平分线相交于点
,求
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(3)如图3,
的内角
的平分线与其外角
的平分线相交于点O,设
,则
的度数是______.(用n的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e702e136211878dce558e0457f15df63.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/28/708fc16f-e78d-468a-a8bb-6cc2db1f8002.png?resizew=393)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bc8e50eeccced1d7f3bc52e09a7d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01847a44e59cfd6c285af241c64f04cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
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