如图,在
中,
,将
绕点
逆时针旋转
得到
,若
,
,则
的长为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f1b2678e24ebe55e8543ee7e29cc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/8/79e45526-6c12-47a7-9da9-496db2cda284.png?resizew=169)
更新时间:2023-04-11 01:03:44
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(0.85)
【推荐1】如图,在平面直角坐标系中,矩形
的顶点B的坐标为(4,2),OA,OC分别落在x轴和y轴上,
是矩形的对角线,将
绕点O逆时针旋转,使点B落在y轴上,得到![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d924bdf5ce771060829888cdcc55b0.png)
与
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图象经过点F,则k的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0b612460326448de36e160c8d29af9.png)
![](https://img.xkw.com/dksih/QBM/2022/4/8/2960128913350656/2962970925350912/STEM/7e86cced-42cf-46ee-acf2-a0808c044cb8.png?resizew=135)
您最近一年使用:0次
填空题
|
较易
(0.85)
【推荐2】在平面直角坐标系中,将点
绕点
逆时针旋转
得到点
,若点
恰好在反比例函数
的图像上,则k的值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0004590478204124438f0d138dc5e3e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
您最近一年使用:0次