如图,线段AB的长为20,点D在AB上,△ACD是边长为8的等边三角形,过点D作与CD垂直的射线DP,过DP上一动点G(不与D重合)作矩形CDGH,记矩形CDGH的对角线交点为O,连接OB,则线段BO的最小值为( )
![](https://img.xkw.com/dksih/QBM/2017/5/4/1679620839006208/1684694053371904/STEM/f5dbf694-2a71-4dc0-820a-fc549929fbe9.png)
![](https://img.xkw.com/dksih/QBM/2017/5/4/1679620839006208/1684694053371904/STEM/f5dbf694-2a71-4dc0-820a-fc549929fbe9.png)
A.10 | B.6 | C.8![]() | D.6![]() |
更新时间:2017-05-11 15:01:44
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【推荐1】如图,△ABC和△EFC都是等边三角形,AD是△ABC的高,AB=4,若点E在直线AD上运动,连接DF,则在点E运动的过程中,线段DF的最小值是( )
![](https://img.xkw.com/dksih/QBM/2020/10/21/2575548794060800/2576711875428352/STEM/293dcd7d845942b8bc82588495747b81.png?resizew=139)
![](https://img.xkw.com/dksih/QBM/2020/10/21/2575548794060800/2576711875428352/STEM/293dcd7d845942b8bc82588495747b81.png?resizew=139)
A.1 | B.2 | C.![]() | D.![]() |
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【推荐2】如图所示,在
中,
,点
、
在
内,且点
在
的垂直平分线上,连接
、
、
,若
,则
的长度是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6359a8e852a884aa7585c9c9b9db6021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
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A.5 | B.6 | C.7 | D.8 |
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【推荐1】如图,矩形
的顶点
在第一象限,
轴,
轴且对角线的交点与原点
重合.在边
从小于
到大于
的变化过程中,若矩形
的周长始终保持不变,则经过动点
的反比例函数
中
的值的变化情况是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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A.先增大后减小 | B.先减小后增大 |
C.不变 | D.一直增大 |
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【推荐2】如图,矩形
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,
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,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/a762fb00-c376-4ddb-8d4a-32fd283df254.png?resizew=161)
A.4 | B.5 | C.3 | D.![]() |
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