等腰三角形的腰长为
,底边上的中线长为
,它的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9938aea41f03701b233dee15809f2126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf8111bf36bfb6420a734cc51560e9c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-03-01 10:55:04
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【推荐1】如图,在
中,
,
,
与
是
的两条高,点
是
的中点,连接
.若
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392b9e1a179a6676362679354a9e7e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
A.![]() | B.2 | C.![]() | D.4 |
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【推荐2】在
ABC中,AB=AC,AD⊥BC,垂足为点D,已知AB=5,AD=3,则BC的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
A.8 | B.5 | C.6 | D.10 |
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【推荐2】如图,在Rt△ABC中,∠BCA=90°,点D是BC上一点,AD=BD,若AB=8,BD=5,则CD=( )
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645164794568704/2650796761014272/STEM/2451a5d71f4f4124a4b0fa960acbb6a0.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645164794568704/2650796761014272/STEM/2451a5d71f4f4124a4b0fa960acbb6a0.png?resizew=143)
A.2.1 | B.1.4 | C.3.2 | D.2.4 |
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【推荐1】已知等腰三角形其中一个内角为70°,那么这个等腰三角形的顶角度数为( )
A.70° | B.70°或55° | C.40°或55° | D.70°或40° |
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【推荐2】已知等腰
一边长为3,另一边长是化简
的结果,则该三角形的周长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf166df0871c51b89de47c360e05ec3.png)
A.15 | B.21 | C.15或21 | D.15或12 |
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