题型:单选题
难度:0.65
引用次数:75
题号:17584318
如图,已知正方形
,点E为
的中点,连接
交
于F,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/12b0e030-b64e-4ed4-89cb-464a5a32999c.png?resizew=126)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ddec556dc88a263bf142791bcba6d4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/12b0e030-b64e-4ed4-89cb-464a5a32999c.png?resizew=126)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2022-12-10 19:30:16
|
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【推荐1】如图,两个正方形的边长都为6,其中正方形OEFG绕着正方形ABCD对角线的交点O旋转,正方形OEFG与边AB,BC分别交于点M,N(不与端点重合),设两个正方形重叠部分的面积为m,ΔBMN的周长为n,则下列说法正确的是( )
A.m发生变化,n存在最大值 |
B.m发生变化,n存在最小值 |
C.m不发生变化,n存在最大值 |
D.m不发生变化,n存在最小值 |
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【推荐2】如图,四边形
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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A.5 | B.4 | C.![]() | D.![]() |
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【推荐1】如图,在△ABC中,点D,E分别是边AC,AB的中点,BD与CE交于点O,连接DE,下列结论:①
;②
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.其中正确的个数有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/cf135d02-d59e-4541-b066-d5c20d7a58ea.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57b41fcd305cc4c7234fb7ed8eec1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82ce0700649b66a6fd9336b6814f755.png)
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【推荐2】如图,平面直角坐标系中,点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20164cc28ea7d8e59e63fa2daff91576.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/ae90c866-268c-42eb-ab04-9f6aa6b71bc4.png?resizew=159)
A.9 | B.14 | C.30 | D.35 |
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