如图,在
中,
,点
是
的中点,
交
于
;点
在
上,
,
,
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/28c1cf33-c919-4002-a408-a10c48e3e754.png?resizew=129)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e744f480e11f588570c5d6738799f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bd1ffa355edcdc023b5a6b47ca7526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48813b8fc61cdb0c54fbc6a2e4bbd30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/28c1cf33-c919-4002-a408-a10c48e3e754.png?resizew=129)
A.12 | B.10 | C.8 | D.6 |
更新时间:2021-02-05 21:15:53
|
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【推荐1】如图,∠MON=30°,点A1,A2,A3,…在射线ON上,点B1,B2,B3,…在射线OM上,△A1B1A2,△A2B2A3,△A3B3A4,…均为等边三角形,若OA1=1,则△A2021B2021A2022的边长为( )
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853282304155648/2855534567743488/STEM/3bb800c9-59b3-41f9-8c47-4d200090e983.png)
![](https://img.xkw.com/dksih/QBM/2021/11/17/2853282304155648/2855534567743488/STEM/3bb800c9-59b3-41f9-8c47-4d200090e983.png)
A.4044 | B.22020 | C.22021 | D.22022 |
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名校
【推荐2】如图,在
中,
,将
绕顶点
逆时针旋转得到
,
是
的中点,
是
的中点,连接
若
,
,则线段
的最大值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/d8c16e95-2bd7-4f5b-ae76-29e528735e38.png?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.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/6b185184dc2dc3894a0313fd13f26a59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c56c9b208df9c7d97ebf99118d8013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/d8c16e95-2bd7-4f5b-ae76-29e528735e38.png?resizew=154)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在
中,
,
,以点A为圆心,以
为半径作弧交
于点D,连接
,以点D为圆心,以
为半径作弧交
于点E,分别以点C、E为圆心,以大于
的长为半径作弧,两弧交于点P,作射线
交
于点F,以下结论不正确 的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236c72942e305dfdede4b4f44c650e59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da9e344db406c0fc59b42dcbd88e051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,已知正方形
的边长为4, P对角线
一点,
于点E,PF⊥CD于点F,连接
.给出下列结论:①
;②四边形
的周长为8;③
一定是等腰三角形;④
;⑤
的最小值为
.其中正确结论的序号为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/6/963dd265-9a02-4cf2-a790-72f9b3639ed6.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2ef99db257cc1acb08e3a5e0006d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3f9e85ee3040e0228eab9bdb14a9db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6350abc2bc9e38dca81a52a856c0f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fce76109c3b574feaca9cd7029c2875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/6/963dd265-9a02-4cf2-a790-72f9b3639ed6.png?resizew=167)
A.①②④⑤ | B.①②③④ | C.①②④ | D.②④⑤ |
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