如图,
,若
,
,则
等于________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97586c576e2f9c5b7136e6e9c703c0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b49bd51260d0ffdaf5e1e00fd090e8a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb8facd8fc2a26f60dfa5686cf7421ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d7f5e5982d0d16bb6ade6feeb6c1c6.png)
![](https://img.xkw.com/dksih/QBM/2020/2/6/2400253780000768/2433317368479745/STEM/952724d2d1f04cafa35b7e6dd235bd21.png?resizew=106)
更新时间:2020-04-10 14:46:49
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【知识点】 根据平行线的性质探究角的关系解读
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【推荐1】如图,已知
,
平分
,
平分
,
,
,则
的度数为___________ .(用含n的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
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【推荐2】在△ABC中,射线AG平分∠BAC交BC于点G,点D在BC边上运动(不与点G重合),过点D作DE∥AC交AB于点E,∠EDB的角平分线所在直线交AB于点H,交射线AG于点F,则∠B与∠AFD之间的数量关系是__ .
![](https://img.xkw.com/dksih/QBM/2021/9/13/2807422172291072/2809974125535232/STEM/44eff531-71df-4c0a-8f46-1fd32b0c9e05.png)
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