如图,
为
的中线,
平分
,
平分
,
,
,若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/9261e3c2-0b55-4dc3-b886-979bc33194ce.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c182a9d9fd0a7023b710cd671d9468e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937c5db73d81da5525d4d35885dac04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03239fcfb349ff3b79e716783cc82f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/9261e3c2-0b55-4dc3-b886-979bc33194ce.png?resizew=148)
A.30° | B.40° | C.50° | D.60° |
21-22八年级上·陕西汉中·期中 查看更多[2]
更新时间:2022-12-25 16:02:19
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【推荐1】如图,在Rt△ABC中.∠B=90°,∠A=30°,DE垂直平分斜边AC,交AB于D,E是垂足,连接CD.若BD=2,则AC的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/27/e6b02942-32c9-426c-bdd1-b115daf877f0.png?resizew=97)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/27/e6b02942-32c9-426c-bdd1-b115daf877f0.png?resizew=97)
A.4 | B.8 | C.4![]() | D.2![]() |
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【推荐2】如图,四边形ABCD是正方形,延长AB到点E,使AE=AC,则∠BCE的度数是( )
![](https://img.xkw.com/dksih/QBM/2016/11/29/1574256176275456/1574256181690368/STEM/9bb9a6ce72054c67b73f2d4f9df3ce47.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/2016/11/29/1574256176275456/1574256181690368/STEM/9bb9a6ce72054c67b73f2d4f9df3ce47.png?resizew=143)
A.22.5° | B.25° | C.23° | D.20° |
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【推荐1】小亮设计了如下测量一池塘两端
的距离的方案:先取一个可直接到达点
,
的点
,连接
,
,延长
至点
,延长
至点
,使得
,
,再测出
的长度,即可知道
,
之间的距离.他设计方案的理由是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e37b122a7273e1251ea3860e74c896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8da10b2137a1e87801556a313e625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e37b122a7273e1251ea3860e74c896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8da10b2137a1e87801556a313e625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e70237deda2775563672308400a1f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787979ac589c36a9732297615debdd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/17/8f9ac066-cdc6-4aa8-8c18-f93cc9c49932.png?resizew=127)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,点P是反比例函数
的图象上一点,过点P作PA⊥y轴于点A,点B是点A关于x轴的对称点,连接PB,若△PAB的面积为6,则k的值为( )
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987821815545856/2989220851056640/STEM/20ee43ff-a4ed-4c52-b11a-e80ec1fc1051.png?resizew=155)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d850dfecb5d18d9c39c1b7dfb3f2aa4d.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987821815545856/2989220851056640/STEM/20ee43ff-a4ed-4c52-b11a-e80ec1fc1051.png?resizew=155)
A.-3 | B.6 | C.-6 | D.-12 |
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【推荐2】如图,∠ACB=90°,AC=BC,BE⊥CE于点E,AD⊥CE于点D,下面四个结论:①∠ABE=∠BAD;②
CEB≌
ADC;③AB=CE;④AD﹣BE=DE,其中正确的序号是( )
![](https://img.xkw.com/dksih/QBM/2021/11/11/2848769895006208/2852366572765184/STEM/c767bf44-5cea-46fe-9916-87e89d030fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2021/11/11/2848769895006208/2852366572765184/STEM/c767bf44-5cea-46fe-9916-87e89d030fc7.png)
A.①②④ | B.①②③ | C.①③④ | D.①②③④ |
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