如图,点M是正方形ABCD内一点,△MDC是等边三角形,连接AM、BM,对角线BD交CM于点N,给出下列结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/1/1711fdec-4470-48f4-87e0-80105e51492c.png?resizew=126)
①
,②
,
③
,④
.
其中正确结论的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/1/1711fdec-4470-48f4-87e0-80105e51492c.png?resizew=126)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1f7b6542a43ef6be3755352ffb46596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a69fcb7ed01df495de6fdd2a94f7d5.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccca2395d848895b1e2cef3704b537ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af50b5a9d82ec61ebacb960b1c0235c.png)
其中正确结论的个数为( )
A.1个 | B.2个 | C.3个 | D.4个 |
更新时间:2022-08-31 22:06:21
|
【知识点】 图形的性质
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【推荐1】如图,在正方形ABCD中,对角线AC,BD相交于点O,E为OC上的动点(不与O,C重合),作
,垂足为G,分别交BC,OB于F,H,连接OG,CG.下列结论:①
;②GO平分
;③
;④
,其中正确结论的题号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/77012511-25c5-47a0-9393-e68d7635fc84.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187ed13a7bd532bd39af5e5ad7493a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb884980cf4a6fd4d48a4b6e2d480739.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/77012511-25c5-47a0-9393-e68d7635fc84.png?resizew=160)
A.①③④ | B.①②③ | C.①②④ | D.①②③④ |
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【推荐2】如图,已知在平面直角坐标系
中,反比例函数
在第一象限经过
的顶点
,且点
在
轴上,过点
作
轴的垂线交反比例函数图象于点
,连结
交
于点
,已知
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/db356a9d-de8c-4345-9c01-4f613768a3a3.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0b612460326448de36e160c8d29af9.png)
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![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/db356a9d-de8c-4345-9c01-4f613768a3a3.png?resizew=158)
A.6 | B.![]() | C.![]() | D.![]() |
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