如图,在
中,
是
边上的中线,将
沿着
翻折,点
的对称点为
.已知
,
,那么点
与点
之间的距离为( )
![](https://img.xkw.com/dksih/QBM/2022/4/26/2972220067168256/2979812631158784/STEM/df9a8e98-0378-4319-8081-dee0073f9836.png?resizew=231)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6662097cf94dc37facdaba44b49966d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2972220067168256/2979812631158784/STEM/df9a8e98-0378-4319-8081-dee0073f9836.png?resizew=231)
A.3 | B.![]() | C.![]() | D.4 |
更新时间:2022-05-15 10:27:13
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名校
【推荐1】如图,
是
的中线,
比
长
,若
的周长为
,则△
的周长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/933dddcf-4404-4f82-8dc6-6544461817e5.png?resizew=112)
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【推荐2】如果AD是△ABC的中线,那么下列结论一定成立的有( )
①BD=CD;②AB=AC;③S△ABD=
S△ABC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/791bb00e-0b8e-4a7c-a0fd-d1840f2e6db6.png?resizew=217)
①BD=CD;②AB=AC;③S△ABD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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【推荐1】如图,△ABC中,AB=AC=15,D在BC边上,DE
BA于点E,DF
CA交AB于点F,那么四边形AFDE的周长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/8f5b7cf0-7d4a-408d-943b-02d96d171153.png?resizew=121)
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【推荐2】如图,在
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:
:
,
平分
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5570aa134872995b807ca61158300ea.png)
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【推荐1】在三边分别为4、4、6的等腰三角形中,底边上的高是( )
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【推荐2】如图,在△ABC中点D是AB边上的一点,且AD=3BD,连接CD并取CD的中点E,连接BE,若∠ACD=∠BED=45°,且CD=
,则AB的长为( )
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【推荐1】如图,在矩形
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【推荐2】如图,直角三角形纸片的两直角边长分别为6,8,现将
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