如图,
内切于正方形
,边
分别与
切于点
,点
分别在线段
上,且
与
相切.若
的面积为
,则
的半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a887678ca42faa3d289e2b6460790b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbdd93803e139cce24fe064e8371ea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbec471ffed534e60ec40d48b9f0968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-25 11:07:29
|
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名校
【推荐1】如图,点A、B为直线y=x上的两点,过A、B两点分别作y轴的平行线交双曲线
(x>0)于点C、D两点.若BD=2AC,则4OC2﹣OD2的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/23/affe100d-2bdf-4b76-a2c4-756fe2b0e223.jpg?resizew=132)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45ce7db3ffe6467a3be41641b8a702f.png)
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A.5 | B.6 | C.7 | D.8 |
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【推荐2】如图,矩形
中,
,
,把矩形
沿过点
的直线
折叠点
落在矩形
内部的点
处,则
的最小值是( )
![](https://img.xkw.com/dksih/QBM/2018/5/25/1952827751669760/1954783619563520/STEM/857d01a953b846f6b2224237841acf16.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】安安同学在正三角形中放入正方形
和正方形
(两个正方形不重叠),使得
在边AB上,点P,N分别在边
上.下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17dea6aa2b6d8362542af3a7a8d55c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aad5d8a1ff80972049abdc147ca0595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc86286cc87af159866966208db78729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/170ee2d7664c87b7a40887b11d01d2ce.png)
A.两个正方形边长和的最小值为![]() | B.两个正方形的边长差为3 |
C.两个正方形面积和的最小值为![]() | D.两个正方形面积和的最大值为![]() |
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【推荐2】如图,正方形ABCD的边长为3,点E,F分别是BC,CD边上的动点,并且满足
,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/2022/5/30/2990519694008320/2991229874331648/STEM/e4edc42f-0846-46f1-ba5e-f0da9d7792e0.png?resizew=131)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
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A.6 | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,
,
切
于
、
两点,
切
于点
,分别交
,
于
,
,
,若
的半径为
,
的周长等于
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8946331b0a9d86e1a9c78797f3021455.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
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【推荐2】如图,在平面直角坐标系中,
是直角三角形,
,
,直角边
在
轴上,其内切圆的圆心坐标为
,拋物线
的顶点为A,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/1932b1b0-eba1-44f9-a8a1-dc00059827ef.png?resizew=251)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/085bfd74028a49d4fb05d0c04371cbcd.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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