如图,菱形
在平面直角坐标系中的位置如图所示,
,
,把菱形
绕点
逆时针旋转,使点
落在
轴上,则旋转后点
的对应点
的坐标为().
![](https://img.xkw.com/dksih/QBM/2020/6/13/2483949110312960/2485222606528512/STEM/8187bd6f1e794dc0871921f18ee60c81.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79684a6e92297749c005e2b23cac9710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://img.xkw.com/dksih/QBM/2020/6/13/2483949110312960/2485222606528512/STEM/8187bd6f1e794dc0871921f18ee60c81.png?resizew=174)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
2020·河南商丘·二模 查看更多[2]
更新时间:2020-06-15 15:41:14
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【推荐1】如图1,点F从菱形ABCD的顶点A出发,沿A→D→B以1cm/s的速度匀速运动到点B,△FBC的面积y(cm2)随时间x(s)变化的关系图象,则a的值为( )
![](https://img.xkw.com/dksih/QBM/2022/2/12/2914728309235712/2924721806532608/STEM/bc2a4380f048486da5e70fda25883a0a.png?resizew=289)
![](https://img.xkw.com/dksih/QBM/2022/2/12/2914728309235712/2924721806532608/STEM/bc2a4380f048486da5e70fda25883a0a.png?resizew=289)
A.![]() | B.2 | C.![]() | D.2 |
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【推荐2】如图,在菱形ABCD中,tanA=
,M,N分别在边AD,BC上,将四边形AMNB沿MN翻折,使AB的对应线段EF经过顶点D,当EF⊥AD时,
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/30/45f35a82-13c6-4860-ac2a-63186f012c14.png?resizew=267)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96acdc7df123f9670d19267dbfd6faf7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/30/45f35a82-13c6-4860-ac2a-63186f012c14.png?resizew=267)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在平面直角坐标系中,A(-8,-1),B(-6,-9),C(-2,-9),D(-4,-1)先将四边形ABCD沿x轴翻折,再向右平移8个单位长度,向下平移1个单位长度后,得到四边形A1B1C1D1,最后将四边形A1B1C1D1,绕着A1旋转,使旋转后的四边形对角线的交点落在x轴上,则旋转后的四边形对角线交点坐标为( )
![](https://img.xkw.com/dksih/QBM/2020/12/16/2615583071559680/2618518971482112/STEM/0de05226-0b4e-4412-a909-1d958ce4058f.png)
![](https://img.xkw.com/dksih/QBM/2020/12/16/2615583071559680/2618518971482112/STEM/0de05226-0b4e-4412-a909-1d958ce4058f.png)
A.(4 ,0) | B.(5,0) | C.(4,0)或 (5,0) | D.(5,0)或(-5,0) |
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【推荐2】如图,等边
中,点
在
轴正半轴上,点
坐标为
,将
绕点
逆时针旋转
,此时点
对应点
的坐标是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/aea25c64-8176-4333-94a1-e22b21bcb125.png?resizew=188)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d7ffb7889a31b267a85f1ea238138e.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】下列四个图形中,既是轴对称图形,又是中心对称图形的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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