如图所示,有一张一个角为
的直角三角形纸片,沿其一条中位线剪开后,不能拼成的四边形是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/6/f135dfd2-9a3c-449a-b7fa-981038ca7025.png?resizew=75)
16-17八年级·内蒙古通辽·期末 查看更多[2]
2016-2017学年内蒙古通辽市八年级(下)期末数学试卷(已下线)专题1.19 特殊平行四边形(中考常考考点分类专题)(提升练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)
更新时间:2018-01-12 17:23:43
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【推荐1】如图,梯形ABCD的两条对角线交于点E,图中面积相等的三角形共有____ 对.
![](https://img.xkw.com/dksih/QBM/2018/5/3/1937464887156736/1938336802537472/STEM/cd111d1fefdd43cbaf0740c555d0165f.png?resizew=126)
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【推荐2】如图,在梯形
中,
,
,
,
、
分别是
、
的中点,
是直线
上的一点,则
的最小值为______ .
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【推荐1】下列说法:
①对角线互相垂直且相等的四边形是菱形
②矩形的对角线互相垂直
③一组对边平行且相等的四边形是平行四边形
④对角线垂直的矩形是正方形
其中正确的是________ .(把所有正确结论的序号都填上)
①对角线互相垂直且相等的四边形是菱形
②矩形的对角线互相垂直
③一组对边平行且相等的四边形是平行四边形
④对角线垂直的矩形是正方形
其中正确的是
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【推荐2】把“直角三角形、等腰三角形、等腰直角三角形”填入下列相应的空格上.
(1)正方形可以由两个能够完全重合的____________________ 拼合而成;
(2)菱形可以由两个能够完全重合的______________________ 拼合而成;
(3)矩形可以由两个能够完全重合的______________________ 拼合而成.
(1)正方形可以由两个能够完全重合的
(2)菱形可以由两个能够完全重合的
(3)矩形可以由两个能够完全重合的
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【推荐1】如图,点
,
分别是锐角
两边上的点,
,分别以点
,
为圆心,以
的长为半径画弧,两弧相交于点
,连接
,
.则四边形
是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】若平行四边形
的对角线
,且
,则
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
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【推荐1】如图,在
中,
,D,E,F分别是
,
,
的中点,连接
,
,
.如果_____________ ,那么四边形
是正方形(要求:①不再添加辅助线;②只需填一个符合要求的条件).
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【推荐2】四边形
的对角线
和
相交于点
,则下列几组条件中能判定它是正方形的是____ .(只需要填上序号)
①
,
;
②
,
,
,
;
③四边形
是矩形,并且
;
④四边形
是菱形,并且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c8d4807d06fd8082d68b7c76c4d0c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f83fbec0cba7879555674a9561819.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4738132e10d0dfad2e3d82e18a1765e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8be8785d72d096b4d508e7082294914.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5034a973110e2a6eb2e7d5699c24f3.png)
③四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1210961f8161e071ceec1f1855acbf73.png)
④四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f83fbec0cba7879555674a9561819.png)
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