如图,等腰直角三角形
中,
,且
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/5479f0c3-58a4-41e0-be73-07dd6f85da77.png?resizew=132)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42b8e2976c68e41341d4ebf29be8df90.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/5479f0c3-58a4-41e0-be73-07dd6f85da77.png?resizew=132)
A.4 | B.8 | C.![]() | D.6 |
更新时间:2023-01-29 13:26:59
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【推荐1】如图,△ABC内接于⊙O,其外角平分线AD交⊙O于D,DM⊥AC于M下列结论:①DB=DC;②AC-AB=2AM;③AC+AB=2CM;④
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其中正确的有( )
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A.只有④② | B.只有③④ |
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【推荐2】如图,已知点D在AC上,点B在AE上,
,且∠BDA=∠A,若∠A:∠C=4:3.则∠DBC=( )
![](https://img.xkw.com/dksih/QBM/2020/11/4/2585694219976704/2589499402289152/STEM/bf445767-c768-4243-b829-db1dec029316.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b65683ed96a4e6fdabba4ca23062ead6.png)
![](https://img.xkw.com/dksih/QBM/2020/11/4/2585694219976704/2589499402289152/STEM/bf445767-c768-4243-b829-db1dec029316.png?resizew=177)
A.12° | B.24° | C.20° | D.36° |
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【推荐1】如图,正方形
的边
在x轴正半轴上,且点
.将正方形
绕点A逆时针旋转,得到正方形
,若点D的对应点G恰好落在y轴正半轴上,则点F的坐标是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/a007e695-f783-48f4-9850-e4652151c9db.jpg?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/a007e695-f783-48f4-9850-e4652151c9db.jpg?resizew=154)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,直线l上有三个正方形a,b,c,若a,c的面积分别为5和11,则b的面积为( )
![](https://img.xkw.com/dksih/QBM/2019/8/1/2259315537461248/2260773101518848/STEM/531299e9d5cf48e296bddb4004a14689.png?resizew=195)
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【推荐1】方程
的两个根是等腰三角形的底和腰,则这个等腰三角形的周长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248ca19888d149106cc192f86a7c51f2.png)
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【推荐2】已知等腰三角形的两边长分别为3和4,则其周长为( )
A.8 | B.![]() | C.![]() | D.![]() ![]() |
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