在矩形
中,
与
相交于点O.
经过点B,如果
与
有公共点,且与边
没有公共点,那么
的半径长r的取值范围是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb1ee129ee9bfe26201b30b89c7ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
2024·上海青浦·二模 查看更多[2]
2024年上海市青浦区中考二模数学试题(已下线)专题10 填空小压轴(新定义、翻折、旋转、圆、其它)60题专练(含24年上海最新模拟题)-2024年中考数学毕业班二轮热点题型归纳与变式演练(上海专用)
更新时间:2024-04-19 19:15:42
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【推荐1】如图,在矩形
中,
为对角线,点F在
上,连接
交
于点E,且
,
;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46c020c0ad475d55ef85d1e83131706.png)
__________ ;
(2)若
,
为等腰直角三角形,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d151cd24c2f9c320eb54e69d71e5cb46.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34d8e898a948e408f3f331245b366b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a54049b5c43495c4f00f7a364cc5b8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46c020c0ad475d55ef85d1e83131706.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4a05a08dc761f18a3d588e6d4b2672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc727c642cbc2181476b7dd8eca471e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ec09b87aa9c2d77d6d82863ed0ccd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d151cd24c2f9c320eb54e69d71e5cb46.png)
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名校
【推荐2】矩形ABCD的两条对角线相交于O,∠AOD=120°,AB=3cm,则BD=__ cm.
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【推荐1】如图,在平面直角坐标系中,有7个半径为1的小圆拼在一起,下面一行的4个小圆都与x轴相切,上面一行的3个小圆都在下一行右边3个小圆的正上方,且相邻两个小圆只有一个公共点,从左往右数,y轴过第2列两个小圆的圆心,点P是第3列两个小圆的公共点.若过点P有一条直线平分这7个小圆的面积,则该直线的函数表达式是______________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/c0850ad5-bd5f-4720-a9ea-b3ea5203901e.png?resizew=252)
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【推荐2】如图,在
中,
和
的平分线相交于点
,过点
作
交
于
,交
于
,过点
作
于
.下列四个结论:①
;
②以
为圆心、
为半径的圆与以
为圆心、
为半径的圆外切;③
是
的中位线;④设
,
,则
.其中正确的结论是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476b0b8378f4b0f73f3dc5d84d89f616.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11c1db76cc7e1894f74a50d71736455.png)
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②以
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】如图,矩形纸片ABCD中,AD= 1,AB=2.将纸片折叠,使顶点A与边CD上的点E重合,折痕FG分别与AB、CD交于点G、F,AE与FG交于点仪当触ED的外接圆与BC相切于BC的中点N,则折痕FG的长为________
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【推荐2】如图,直线
与
轴、
轴分别交于点
,
,过点
作直线
轴,点
为直线
上的一个动点,以点
为圆心,
为半径作圆,当
与直线
相切时,点
的坐标为_____ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐1】如图,在
中,
,
,点D在直线
上,连接
,将
绕点D逆时针旋转,得到线段
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,
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交
于点N,若
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______ .
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【推荐2】如图,
中,
,
,
,把
绕点
顺时针方向旋转
度
得到
,
交射线
于点
,当
是等腰三角形时,则线段
的长为______ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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