如图,在矩形
中,
,
.把
沿
折叠,使点
恰好落在
边上的
处,再将
绕点
顺时针旋转
,得到
,使得
恰好经过
的中点
.设
交
于点
,连接
.有如下结论:①
;②
的长度是
;③
;④
.上述结论中,正确的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b3fa3410cdc4312c58becbaab71f7a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49292583fbc845c080fa5436aa52efb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eba8ef753df3569875282d12342c149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3923c57a6ad81dceb202ece8d2260eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9f2254db4904e59e76a2bd5dbcf18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71fe246270d1277f9eb2bf15af22e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab9ade9bfd2479c0a61bf0601b46a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37cb0e2dfa80f0f60456db5d29e967a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ad8c18c35211f533cafcf5f65230f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/9/97723b0c-1b1d-4deb-8ae4-9415dd073416.png?resizew=201)
A.1个 | B.2个 | C.3个 | D.4个 |
更新时间:2023-07-14 08:50:46
|
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【推荐1】如图,以任意△ABC的边AB和AC向形外作等腰Rt△ABD和等腰Rt△ACE,F、G分别是线段BD和CE的中点,则
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在正方形
中,E是线段
上一动点,连接
交
于点F,过点F作
交
于点G,连接
,现有以下结论:①
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;③点A到
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的三等分点时,
或
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/b78cdef9-b8d1-43af-ae71-3c4c376e964c.png?resizew=141)
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【推荐1】如图,将含有30°角的直角三角板OAB按如图所示的方式放置在平面直角坐标系中,OB在x轴上,若OA=4,将三角板绕原点O逆时针旋转,每秒旋转45°,则第2022秒时,点A的对应点A′的坐标为( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/97b8e922-c11f-40d0-a7e6-e5c8b039aa3b.png?resizew=178)
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【推荐2】在平面直角坐标系中,已知点A、B的坐标分别A
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.以
为斜边在右上方作
.设点C坐标为
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的最大值为( )
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【推荐1】如图,正方形ABCD中,AB=12,点E在边BC上,BE=EC,将
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;②BG=2AG;③
;④
.其中正确结论的个数是( )
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名校
【推荐2】如图,在边长为4的正方形ABCD中,点E,F分别是边BC, AB的中点,连接AE,DF交于点O,将△ABE沿AE翻折,得到△AGE,延长EG交AD的延长线于点H,连接CG.有以下结论:①AE⊥DF;②AH=EH;③
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【推荐1】如图,
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外侧作
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,再以点C为旋转中心把
沿着顺时针旋转至
,则下列结论:
①D、A、E三点共线;②
为等边三角形;③
平分
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