已知
且对应中线之比为
,则
与
的周长之比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386569b7865405a043dd32e4a8e2ce88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ae7ad653c54da9d7c73360af3375d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3634979dfcebf857b20874dd320d80b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-01-06 18:25:59
|
【知识点】 利用相似三角形的性质求解解读
相似题推荐
单选题
|
适中
(0.65)
【推荐1】已知
的三边长分别为1,
,
,
的两边长分别为
和
.若
,则
的第三边长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf1ac64c2d7dc6a94f6c5b66fe67618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
A.![]() | B.2 | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,在
中,
,点D是AB的中点,连结CD,过点B作BG⊥CE,分别交CD、CA于点E、F,与过点A且垂直于AB的直线相交于点G,连结DF,给出以下五个结论:
①
;②
;③点F是GE的中点;④
;⑤
,其中正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/2018/8/14/2010467913916416/2012981560008704/STEM/59504025d2b648fd872df92be9227f30.png?resizew=90)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fe5e9593cf384fd771aacb11c62aa6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4154d71f113f819e9ca73857379b70f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1f12fcdcd1e4d7560fbb6eed485735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb2dca1bcef175d31799f7b9cd7d249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f4b5eed9cd2c1e3d7944617064e347.png)
![](https://img.xkw.com/dksih/QBM/2018/8/14/2010467913916416/2012981560008704/STEM/59504025d2b648fd872df92be9227f30.png?resizew=90)
A.![]() | B.![]() | C.![]() | D.2 |
您最近一年使用:0次