如图,矩形ABCD的边CD上有一点E,∠DAE=22.5°,EF⊥AB,垂足为F,将△AEF绕着点F顺时针旋转,使得点A的对应点M落在EF上,点E恰好落在点B处,连接BE.下列结论:①BM⊥AE;②四边形EFBC是正方形;③∠EBM=22.5°;④
.其中结论正确的序号是( )
![](https://img.xkw.com/dksih/QBM/2021/7/14/2763864723087360/2770580878475264/STEM/a8d3a5cd76974100ac580c62caf937f1.png?resizew=196)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f64346961f728f2ad9112f070ceeba9a.png)
![](https://img.xkw.com/dksih/QBM/2021/7/14/2763864723087360/2770580878475264/STEM/a8d3a5cd76974100ac580c62caf937f1.png?resizew=196)
A.①② | B.①②③ | C.①②④ | D.③④ |
2021·黑龙江牡丹江·模拟预测 查看更多[4]
黑龙江省牡丹江市、鸡西市朝鲜族学校联合体2021年中考数学真题试卷湖北省省直辖县级行政单位潜江市2021-2022学年九年级下学期3月月考数学试题(一模)2022年黑龙江省大庆市九年级中考二模数学试题(已下线)2022年湖北省黄冈市中考数学真题变式题6-10题
更新时间:2021-07-23 19:44:08
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【推荐1】如图,已知
中,
,
,
,
是
的垂直平分线,
交
于点
,交
于点
,连接
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.1 | B.1.5 | C.2 | D.2.5 |
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【推荐2】下列说法正确的有( )
①若a、b、c是
的三边,则
;
②算术平方根是它本身的数是0或1;
③
的平方根是
;
④如果点A与点B的纵坐标相同,则它们关于y轴对称;
⑤函数
与y轴的交点坐标是
;
⑥无限小数一定是无理数.
①若a、b、c是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/726a68e52766d662cef59eeddb335d6b.png)
②算术平方根是它本身的数是0或1;
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2b57621e687a87d1bbf76532dad2ecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20d83c9a198076052de7e4d2fcf9aa8.png)
④如果点A与点B的纵坐标相同,则它们关于y轴对称;
⑤函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73ecfaeac5db3976fe465b6f3ea977e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e73d595d3fba2d2915ef7cfc6c94d1e.png)
⑥无限小数一定是无理数.
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【推荐1】如图,矩形
中,
为
的中点,过点
作
分别交
于点
若
则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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真题
【推荐2】如图,在等腰直角
中,
,
、
分别为
、
上的点,
,
为
上的点,且
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2021/9/1/2798915124117504/2804478668636160/STEM/c12af678-5664-44bc-a5f8-6d10c27d5612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://img.xkw.com/dksih/QBM/2021/9/1/2798915124117504/2804478668636160/STEM/c12af678-5664-44bc-a5f8-6d10c27d5612.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,正方形
的边长为
,点O是对角线
、
的交点,过点O作射线
、
分别交边
、
于点E、F,且
,
、
交于点G,
中点为H.给出下列结论:
①
;②
;③四边形
的面积为正方形
面积的
;④
;⑤H点经过的路程为
其中正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979828803723264/2980886532063232/STEM/ea735a95-b4a7-409c-8120-0ff07b7a76ee.png?resizew=147)
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①
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be9c73b5a156cc59e8f907696b64ba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979828803723264/2980886532063232/STEM/ea735a95-b4a7-409c-8120-0ff07b7a76ee.png?resizew=147)
A.①②③④⑤ | B.①②③⑤ | C.①②③ | D.①④⑤ |
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【推荐2】如图,正方形
中,
平分
,点
在边
上,且
.连接
交
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于点
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是线段
上的动点,点
是线段
上的动点,连接
,
.下列四个结论:①
;②
;③
;④
,一定成立的有( )个.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/b8754e50-0d25-4492-94dd-db47628c299f.png?resizew=134)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b670ec1599330f6af99c600404afcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c66d5432bcc6d0d9d5b8a2f9828e75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f34386b222fb204a5164ee36c817f1de.png)
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【推荐1】如图,在等腰直角
中,
,点
为斜边AB上一点,将
绕点
逆时针旋转
得到
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A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,P是正方形ABCD内的一点,将△ABP绕点B顺时针方向旋转到与△CBP′重合,若PB=3,则PP′=( )
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