如图,已知
,
,
,则
的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ff731a6624a093d2b33f1314845afe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19766bbdc2d23ae20e9f34530c3a1543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8551da4a4e18b4e96e01d4eaa84a4f50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-09 22:59:30
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【推荐1】如图,将一张长方形纸条折叠,如果
比
大
则
的度数为( )
![](https://img.xkw.com/dksih/QBM/2020/9/10/2546706602065920/2548056666759168/STEM/17d53c9e-96ea-49ad-95e5-ba3d8c526cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebabf1a4bf05a764c1e3afca96e2651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/2020/9/10/2546706602065920/2548056666759168/STEM/17d53c9e-96ea-49ad-95e5-ba3d8c526cdc.png)
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【推荐2】如图是汽车灯的剖面图,从位于
点灯发出光照射到凹面镜上反射出的光线
,
都是水平线.若
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的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/43c9af6f-900e-43d5-a96c-eb13a99ad85c.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77d5c9e81570bec5a46f1d5d337f1fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
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【推荐1】如图,在
中,
,
,
平分
,对角线
相交于点
,连接
,下列结论中正确的有( )
①
;②
;③
;④
;⑤![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0624b223b2517a0e5ad69d9f01c211.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/77d48f0f-f726-4ed9-a740-4230fe370ee4.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151f7aef7d0f56e18562f5a4030cf815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9228b213dc6b256b752b38a466ebec93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1dc7ed21388204e33ac1952ae561d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a130e7c109e2196b97e1a76281bf3cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/768f344380477c983adc1d241c14f65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0624b223b2517a0e5ad69d9f01c211.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/77d48f0f-f726-4ed9-a740-4230fe370ee4.png?resizew=170)
A.2个 | B.3个 | C.4个 | D.5个 |
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【推荐2】如图,已知△ABC中,BD,CE分别是△ABC的角平分线,BD与CE交于点O,如果设∠A=n°(0<n<180),那么∠COD的度数是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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