如图,抛物线
与
轴交于A、B两点,P是以点
为圆心、2为半径的圆上的动点,Q是线段
的中点,连结
,则线段
的最小值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/a3b64ad7-035a-4cef-ace3-dbe1168c6c32.png?resizew=136)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c7b98cef133174cdadb9f9d87c0095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850e01debd266a398b597a1876dbb3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/a3b64ad7-035a-4cef-ace3-dbe1168c6c32.png?resizew=136)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-12-28 15:53:50
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【推荐1】如图,在平面直角坐标系
中,菱形
的顶点D在x轴上,边
在y轴上,若点A的坐标为
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【推荐2】如图,在平面直角坐标系中,四边形OABC是矩形,点A(6,0),点C(0,8),将矩形OABC绕点A顺时针旋转,当点C的对应点落在AB的延长线上时,点O的对应点的坐标为( )
![](https://img.xkw.com/dksih/QBM/2022/2/12/2914698815053824/2924220942958592/STEM/f343791b-7448-4a8c-b9e3-3bdd5c3adba6.png?resizew=281)
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【推荐1】如图,在矩形ABCD中,周长为12,面积为8,E、F、G、H分别是边上的中点,则四边形EFGH的周长为( )
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948730376601600/2949211928248320/STEM/5d884d8c-d182-4614-9be1-6936dbe71fa5.png?resizew=133)
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【推荐2】如图,矩形纸片
,
,
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边上的点F处,过点F作
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【推荐1】已知点A在半径为r的⊙O内,点A与点O的距离为6,则r的取值范围是 ( )
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【推荐2】若
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