如图,在
中,
,
,
,将
沿射线
的方向平移,得到
,再将
绕点
逆时针旋转一定角度后,点
恰好与点
重合,则平移的距离为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/de9281a9-09e0-40a8-b3a2-901b65633715.png?resizew=265)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/de9281a9-09e0-40a8-b3a2-901b65633715.png?resizew=265)
A.4 | B.2 | C.1 | D.3 |
更新时间:2021-05-29 07:48:22
|
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【推荐1】如图,在等边
ABC中,D为边AC上一点,连接BD,将
BCD绕点B逆时针旋转60°,得到
BAE,连接ED,若BC=20,BD=18,则
AED的周长是( )
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874324160454656/2878063728615424/STEM/0d562370-1beb-4f8f-b022-8412cb98d918.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874324160454656/2878063728615424/STEM/0d562370-1beb-4f8f-b022-8412cb98d918.png?resizew=161)
A.38 | B.36 | C.32 | D.不确定 |
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【推荐2】在矩形
中,
,对角线
与
相交于点O,
,垂足为E,
.则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab3a73f947fe58f60d067b9c51e76a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68746a58e6a12a8687e6af33230103fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/36c23cd3-f8d7-4079-8763-ac93afd6934f.png?resizew=225)
A.4 | B.![]() | C.![]() | D.3 |
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【推荐1】如图,点A,B,C,D,O都在方格纸的格点上,若△COD可以由△AOB旋转得到,则合理的旋转方式为( )
![](https://img.xkw.com/dksih/QBM/2019/6/14/2225498723180544/2225579293769728/STEM/4fe297683d4c450687f322f9938b364a.png?resizew=76)
![](https://img.xkw.com/dksih/QBM/2019/6/14/2225498723180544/2225579293769728/STEM/4fe297683d4c450687f322f9938b364a.png?resizew=76)
A.绕点O顺时针旋转90° |
B.绕点D逆时针旋转60° |
C.绕点O逆时针旋转90° |
D.绕点B逆时针旋转135° |
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【推荐2】如图,在Rt△ACB中,∠ACB=90°,AC=BC,点D是AB上的一个动点(不与点A,B重合),连接CD,将CD绕点C顺时针旋转90°得到CE,连接DE,DE与AC相交于点F,连接AE,若
,AD=2BD,则CF等于( )
![](https://img.xkw.com/dksih/QBM/2019/5/18/2206156949282816/2209297355096064/STEM/8589aec8dee64b85a24fc145cbaebd0e.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97311c12b24f8a4565378bf40e50a1cc.png)
![](https://img.xkw.com/dksih/QBM/2019/5/18/2206156949282816/2209297355096064/STEM/8589aec8dee64b85a24fc145cbaebd0e.png?resizew=144)
A.![]() | B.![]() | C.![]() | D.![]() |
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