如图,小明同学在将一张矩形纸片
的四个角向内折起时,发现恰好能拼成一个无缝隙无重叠的四边形
.于是他测量出
,根据这两个数据他很快求出了边
的长,则边
的长是( )
![](https://img.xkw.com/dksih/QBM/2022/11/22/3115277749305344/3137273558130688/STEM/c9a20acff91d4194b0f360f26559a93b.png?resizew=138)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd588efae3d291a764f8aafdf92a575e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2022/11/22/3115277749305344/3137273558130688/STEM/c9a20acff91d4194b0f360f26559a93b.png?resizew=138)
A.![]() | B.![]() | C.![]() | D.![]() |
22-23八年级上·江苏·期中 查看更多[2]
(已下线)期中考试八年级数学模拟卷(范围:全等三角形、轴对称图形、勾股定理、实数)-【单元测试】2022-2023学年八年级数学上册分层训练AB卷(苏科版)四川省乐山市峨眉山市峨眉第二中学校2022-2023学年九年级下学期5月月考数学试题
更新时间:2022-12-23 21:42:18
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【推荐1】在四边形
中,对角线
,
相交于点O,则下列条件不能 判定四边形
是平行四边形的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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【推荐2】如图,在
中,
,
,直角
的顶点P是
中点,
、
分别交
、
于点E、F.给出以下四个结论:①
;②
是等腰直角三角形;③
;④
.上述结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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【推荐1】在△ABC中,若AC=15,BC=13,AB边上的高CD=12,则△ABC的周长为( )
A.32 | B.42 | C.32或42 | D.以上都不对 |
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【推荐2】如图1,将正方形纸片ABCD对折,使AB与CD重合,折痕为EF如图2,展开后再折叠一次,使点C与点E重合,折痕为GH,点B的对应点为点M,EM交AB于N,AD=4,则CH的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/198e8853-71a4-4f57-9228-dc601ffaeea6.png?resizew=130)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/3296abef-931b-4d19-9748-34422f7c83c4.png?resizew=142)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/198e8853-71a4-4f57-9228-dc601ffaeea6.png?resizew=130)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/3296abef-931b-4d19-9748-34422f7c83c4.png?resizew=142)
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【推荐1】M、N分别是长方形纸条ABCD边AB,CD上两点(
),沿MN所在直线折叠,
交CN于P,如图1所示:继续沿NP折叠,
交BM于Q,如图2所示,设
为
,
为
,则
与
的数量关系为( )
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【推荐2】如图,在矩形
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