如图,在
中,
,将
绕顶点A逆时针旋转至
,此时点D在
上,连接
,线段
分别交
于点H、K,则下列四个结论中:①
;②
是等边三角形;③
;④当
时,
;正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/4e3dee02-dd1a-42d6-8543-3220eea76aaf.png?resizew=208)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8204eaede51c9af72234220ab06eb50b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b63d7f14508d4e66f53b507ba4839bf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/240527d091545588c1d7a2572d77a198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93e4e97d4a751bf19a48f4c7eda8768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b238947afe06e2fb5f2a98bde3bd0f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f8a2a8386b36df8678110ff644647b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a560dbe61cb264e99beebb604adb4908.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/4e3dee02-dd1a-42d6-8543-3220eea76aaf.png?resizew=208)
A.①②④ | B.①③④ | C.②③④ | D.①②③ |
21-22八年级下·广东深圳·期末 查看更多[7]
广东省深圳市龙华区2021-2022学年八年级下学期期末数学试题(已下线)第二十三章 旋转(B卷·学霸加练卷,难度★★★★★)-【单元测试】2022-2023学年九年级数学上册分层训练AB卷(人教版)(已下线)期末难点特训(一)选填压轴50道-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(北师大版)(已下线)专题4.10 图形的相似章末十大题型总结(拔尖篇)-2023-2024学年九年级数学上册举一反三系列(北师大版)(已下线)专题23.10 图形的相似章末十大题型总结(拔尖篇)-2023-2024学年九年级数学上册举一反三系列(华东师大版)(已下线)专题4.10 相似三角形章末十大题型总结(拔尖篇)-2023-2024学年九年级数学上册举一反三系列(浙教版)(已下线)专题22.10 相似形章末十大题型总结(拔尖篇)-2023-2024学年九年级数学上册举一反三系列(沪科版)
更新时间:2022-07-15 22:51:21
|
相似题推荐
单选题
|
较难
(0.4)
名校
【推荐1】如图,已知△ABE与△CDE都是等腰直角三角形,∠AEB=∠DEC=90°,连接AD,AC,BC,BD,若AD=AC=AB,则下列结论:①AE垂直平分CD,②AC平分∠BAD,③△ABD是等边三角形,④∠BCD的度数为150°,其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/1d7fb10f-c0d2-4e9e-bff4-4d24d0dba940.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/1d7fb10f-c0d2-4e9e-bff4-4d24d0dba940.png?resizew=143)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐2】如图,边长为12的等边三角形ABC中,M是高CH所在直线上的一个动点,连结MB,将线段BM绕点B逆时针旋转60°得到BN,连结HN.则在点M运动过程中,线段HN长度的最小值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/c59e5128-d867-4ac2-9dce-3e753173fd60.png?resizew=136)
A.6 | B.3 | C.2 | D.1.5 |
您最近一年使用:0次
单选题
|
较难
(0.4)
名校
【推荐1】如图,在
中,
于点
,延长
于点
交于
,延长
与
的延长线交于点
,下面给出四个结论:①
;②
;③
;④
;⑤线段
与
互相平分.其中正确的结论有( )个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4a5f795088be22ac4821c101ce329d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ff7bf8ffc8a04186e3e13c1a6d5ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d3d571e3f2eb552ae33d8306bbff6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2e2c57aac739969050b9716e375804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b373ae8d00a538e0fbb0c37866d7b329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6b45287ecf94566b572cff015d4aba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/939744473f366e58b142b48cdbf70a96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐2】如图,平行四边形 ABCD 中,AD∥BC,AB=BC=CD=AD=4,∠A=∠C=60°,连接 BD,将△BCD 绕点 B 旋转,当 BD(即 BD′)与 AD 交于一点 E,BC(即 BC′)同时与 CD 交于一点 F 时,下列结论正确的是( )
①AE=DF;②∠BEF=60°;③∠DEB=∠DFB;④△DEF 的周长的最小值是4+2![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2018/12/24/2103955049390080/2106733554409472/STEM/f6156637b8f64f28b6f42af578a155c0.png?resizew=162)
①AE=DF;②∠BEF=60°;③∠DEB=∠DFB;④△DEF 的周长的最小值是4+2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2018/12/24/2103955049390080/2106733554409472/STEM/f6156637b8f64f28b6f42af578a155c0.png?resizew=162)
A.①② | B.②③ | C.①②④ | D.①②③④ |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐1】如图,在平面直角坐标系中,点
,点
、
在
轴上,且
,将
绕点
逆时针旋转
后得到
,
是
上一点,且
,连接
、
,若
,反比例函数
的图象恰好经过点
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c33700c3358cbbd8db376f9f0613b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce008411654123f28f878b8106f5016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cf39c4552ecb2b659f052dc5c0f5eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae8817e7cf3fd712f3ae41795af2217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300d29bf2277a510ab443c1e2a55e1bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7c077cd4bb00f63a992739286ba616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/ba7a3fa9-babe-4db1-9278-8d2b7d358709.png?resizew=197)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
名校
【推荐2】如图,点E为正方形
外一点,连接
,连接
并延长,与
的角平分线交于点F,若
,则
的长度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d700f72590e1fba2c33d5be8a4295f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc95a5e7a66615a0f38a4f47ee2657f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
A.![]() | B.![]() | C.5 | D.5.5 |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐1】如图,在▱
中,
为边
的中点,连接
交
于点
,射线
与射线
交于点
,
与
交于点
,下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ff8c8d239cc12ddc3a899e9f054aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/26/9ecee01f-6dc3-4f55-b2bc-d8a067c37626.png?resizew=183)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐2】矩形纸片
中,
,将纸片对折,使顶点A与顶点C重合,得折痕
,将纸片展开铺平后再进行折叠,使顶点B与顶点D重合,得折痕
,展开铺平后如图所示.若折痕
与
较小的夹角记为
,则
的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/148b9f3a-a44a-46b1-a8aa-08c3d4056cc7.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151f7aef7d0f56e18562f5a4030cf815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/148b9f3a-a44a-46b1-a8aa-08c3d4056cc7.png?resizew=174)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次