如图,点O为平面直角坐标系的原点,点A在x轴上,
是边长为4的等边三角形,以O为旋转中心,将
按顺时针方向旋转60°,得到
,那么点
的坐标为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/968196e0-22fa-48a8-8354-b09ab1f4a53c.png?resizew=133)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17feedef8b38275d0b9bf982a5478ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/968196e0-22fa-48a8-8354-b09ab1f4a53c.png?resizew=133)
A.![]() | B.![]() | C.![]() | D.![]() |
2018·湖北省直辖县级单位·一模 查看更多[10]
【全国市级联考】2018年湖北省天门市2018届九年级中考4月份模拟试卷数学试题山东省临沂市费县第二中学2019-2020学年九年级上学期12月月考数学试题河北省衡水市武邑县2019-2020学年九年级上学期12月月考数学试题江西省新余市2019-2020学年九年级上学期期末数学试题四川省广安市广安第二中学校2019-2020学年九年级上学期期末数学试题黑龙江省齐齐哈尔市拜泉县2018-2019学年九年级上学期期末数学试题(已下线)【南昌新东方】2020年10月雷式三中初三月考 48(已下线)练习19 勾股定理-2020-2021学年【补习教材·寒假作业】八年级数学(人教版)江西省上饶市余干县第三中学2021-2022学年九年级上学期期末数学试题(已下线)九年级开学摸底考(湖北专用)-2023-2024学年九年级数学下学期开学摸底考试卷
更新时间:2020-11-03 10:32:04
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【推荐1】如图,△ABC是等边三角形,AD是角平分线,△ADE也是等边三角形,下列结论:①AD
BC.②EF
FD.③BE
BD.④AC
AE.其中正确的个数是()
![](https://img.xkw.com/dksih/QBM/2018/2/5/1875693316538368/1876709827715072/STEM/b69fb924140d43a1b6b3853551a6a7a7.png?resizew=128)
![](https://img.xkw.com/dksih/QBM/2018/2/5/1875693316538368/1876709827715072/STEM/937cbcd170a94e608d7069356ebb40ea.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2018/2/5/1875693316538368/1876709827715072/STEM/523f5a3802754d5faf5769cf2151cadb.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2018/2/5/1875693316538368/1876709827715072/STEM/523f5a3802754d5faf5769cf2151cadb.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2018/2/5/1875693316538368/1876709827715072/STEM/523f5a3802754d5faf5769cf2151cadb.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2018/2/5/1875693316538368/1876709827715072/STEM/b69fb924140d43a1b6b3853551a6a7a7.png?resizew=128)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】如图,
与
是全等的等边三角形,且A、B、D三点共线,
交于点O,
.现有如下结论:①
;②
,③
;④
;⑤
平分
,平分
;⑥
;一定成立的有( )个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a9df269ecb09cf455ea309f5f65093.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ec81ec83f19cc0c7b7a8bb59f60199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459c561fd7448fc834214851f22b53bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
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A.5个 | B.6个 | C.3个 | D.4个 |
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名校
【推荐1】如图在平面直角坐标系中,正方形
的顶点
的坐标是
,
,顶点
的坐标是
,
,对角线
、
的交点为
将正方形
绕着原点
逆时针旋转,每次旋转
,则第
次旋转结束时,点
的坐标为 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc917f8dd29f5a5fcf4762052bb8fa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8dad333f1e4d81a55709acb4f1a3ac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/251c06e9e0041d2a515407e92f005670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1158b401ca717391b6474d457721a6fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b342d5cb6dd1c84a82f6aca68ed829c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0875d9cad7f9332984f2040a3dea6c60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
A.![]() | B.![]() | C.![]() ![]() ![]() | D.![]() ![]() ![]() |
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【推荐2】在平面直角坐标系中,关于点
的图象变化有以下说法:
①点
关于
轴的对称点
的坐标为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d73ef9855a4dcbf09d87f13ac3bc715.png)
②点
与点
关于原点对称
③把点
先向右平移
个单位长度,再向下平移
个单位长度得到点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874c0c7efab1803d18c887d90d5f3823.png)
④把点
绕原点顺时针旋转
,得到点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18032afea3393a6cef86aa99256faf13.png)
其中,正确的说法是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4bd53db9a694de189001c16123bab5.png)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c2bb7be2e9410a16502268fd4c67be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2db885ad7da56625153d3bceafdb507.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14c6709d2a04863cacdee618b20613e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d73ef9855a4dcbf09d87f13ac3bc715.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c2bb7be2e9410a16502268fd4c67be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0adfa7bbcc9176b4c031f397f4de742.png)
③把点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c2bb7be2e9410a16502268fd4c67be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874c0c7efab1803d18c887d90d5f3823.png)
④把点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c2bb7be2e9410a16502268fd4c67be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a0eb6045369a13358f2d5999f7bc3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18032afea3393a6cef86aa99256faf13.png)
其中,正确的说法是( )
A.①③④ | B.①②③④ | C.①②③ | D.②③④ |
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