如图,正方形的边长为
,点F为对角线
上一点,当
时,则
的长是( )
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-05-10 07:41:24
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【推荐1】如图,在
中,
,AD平分
交BC于D,
于点E,且
,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/2022/10/20/3091816952791040/3096015817711616/STEM/bf7a182e7be04dfe8efa6b3b8221e95a.png?resizew=130)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c2a1e84e17f9a5917cb64f1514e045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321370fe42bc1216902ea19fbd2a5979.png)
![](https://img.xkw.com/dksih/QBM/2022/10/20/3091816952791040/3096015817711616/STEM/bf7a182e7be04dfe8efa6b3b8221e95a.png?resizew=130)
A.6 | B.8 | C.10 | D.12 |
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【推荐2】在
中,用尺规作图作等腰
,下列作图正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
① ② ③ ④
A.①② | B.①③ | C.③④ | D.②④ |
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【推荐1】四个正方形如图摆放,除
外,其余各点均为所在线段的中点.其中最小的正方形边长为
,请问四个正方形中有几个正方形的边长为无理数?( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/8da9d43a-36fe-45ed-a343-0635fa473052.png?resizew=130)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/8da9d43a-36fe-45ed-a343-0635fa473052.png?resizew=130)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】在平面直角坐标系中,正方形
的顶点O的坐标是
,顶点B的坐标是
,则顶点D的坐标是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab158dd9e96abcae0f115f54fa66c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2c84e7b41a841a230ed5f8a42309aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0e705301752424a492f6277ed7774e.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
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