如图,在平面直角坐标系中,
是菱形
对角线
的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
轴且
,
,将菱形
绕点
旋转,使点
落在
轴上,旋转后点
的对应点的坐标是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/2306f5e3-a733-403e-9a78-f10dcc37fced.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/2306f5e3-a733-403e-9a78-f10dcc37fced.png?resizew=176)
A.![]() | B.![]() ![]() | C.![]() | D.![]() ![]() |
21-22八年级下·河北石家庄·期末 查看更多[2]
更新时间:2022-08-28 21:42:59
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【推荐1】下列说法不正确的是( )
A.等腰三角形的对称轴是底边的垂直平分线 |
B.等腰直角三角形底边上的高线等于底边的一半 |
C.直角三角形中有一个角是30°,则这个角所对的直角边是斜边的一半 |
D.等边三角形有一条对称轴 |
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【推荐1】如图,四边形
是菱形,
,
,
于H,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b74e2b6dae540571fdd509c4e966b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3291e1c412a2adb49d3cb760b108dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7cf70f8772d8fea4599b18df2c88f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e09660e8bff0beac4eb769f8145e94b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,点
、
、
、
在☉
上,
,
,则点
到
的距离是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0addac3006a7f99ecb86d656ec111e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152236216f8d1cb39b261108e8fc8b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
A.![]() | B.![]() | C.3 | D.4 |
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【推荐1】如图,菱形
的对角线
相交于点O,过点D作
于点E,点M是边
的中点,连接
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,菱形
的面积为24,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c046abe5361dd5c8fac3ccf6cbe1372.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,菱形ABCD的周长为24cm,对角线AC、BD相交于O点,E是AD的中点,连接OE,则线段OE的长等于( )
![](https://img.xkw.com/dksih/QBM/2012/10/8/1573528550825984/1573528588541952/STEM/22a32fad-f19c-4e03-9590-4e8114cfaeeb.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/2012/10/8/1573528550825984/1573528588541952/STEM/22a32fad-f19c-4e03-9590-4e8114cfaeeb.png?resizew=168)
A.3cm | B.4cm | C.2.5cm | D.2cm |
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【推荐1】如图,将
绕点
逆时针旋转得到
,点
和点
是对应点,若
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的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3657f0b0446428b86d98757cf55ea418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/2cba4c99-43a8-407a-a4ee-8ae4ce15d43a.png?resizew=161)
A.2 | B.![]() | C.4 | D.![]() |
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【推荐2】如图,将一个含
角的直角三角板
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落在
延长线上,则旋转角的度数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/0dd33516-27dd-44af-bf43-a1071e2ee8ea.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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