题型:解答题-问答题
难度:0.85
引用次数:536
题号:16455467
如图,O为直线
上的两点,
,
平分
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/d12bf612-7ee7-424b-a20e-19e5d7a20bff.png?resizew=227)
(1)求
的度数;
(2)
是
的平分线吗?为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6a458b6c0cb375caf76213f6f3d793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95a92fcd0cd5e55f1d32d42504a5690.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/d12bf612-7ee7-424b-a20e-19e5d7a20bff.png?resizew=227)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
更新时间:2022-08-03 11:54:19
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【推荐2】已知:如图所示,∠ABD和∠BDC的平分线交于E,BE交CD于点F,
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【推荐2】如图,已知
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/ff21317a-1518-4481-acb8-86b7721109b7.png?resizew=213)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/ff21317a-1518-4481-acb8-86b7721109b7.png?resizew=213)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2460507a462453e084eaf70a7d867e9.png)
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【推荐3】已知,如图1,OB、OC分别为定角(大小不会发生改变)∠AOD内部的两条动射线,∠AOC与∠BOD互补,∠AOB+∠COD=50°
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(2)如图2,射线OM、ON分别为∠AOB、∠COD的平分线,当∠COB绕着点O旋转时,下列结论:①∠AON的度数不变;②∠MON的度数不变.其中只有一个是正确的,请你做出正确的选择并求值.
(3)如图3,OE、OF是∠AOD外部的两条射线,且∠EOB=∠COF=110°,OP平分∠EOD,OQ平分∠AOF,当∠BOC绕着点O旋转时,∠POQ的大小是否会发生变化?,若不变,求出其度数;若变化,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/7b6d17a6-d2cb-4088-8a72-997f9825c1bd.png?resizew=414)
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