如图,将等腰三角形纸片
(分别在腰
、
上取点
、点
)沿
折叠,使顶点
落在底边
上的点
处,且
,下列结论:①
是等腰三角形;②
是
的中点;③
是等边三角形;④
.其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/093653d7-7044-4be0-9be3-293c3d3ff108.png?resizew=108)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d77e4666fd58a219cc44734cb3d002d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/093653d7-7044-4be0-9be3-293c3d3ff108.png?resizew=108)
A.1 | B.2 | C.3 | D.4 |
23-24八年级上·江西南昌·期中 查看更多[2]
江西省南昌市二十八中教育集团联盟2023-2024学年八年级上学期期中数学试题(已下线)专题1.4 等腰三角形(题型分类拓展)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)
更新时间:2023-11-10 13:54:19
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【推荐1】如图,将三角形纸片ABC沿DE折叠,当点A落在四边形BCED的外部时,测量得∠1=70°,∠2=132°,则∠A为( )
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【推荐2】 (15届江苏初一1试)如图
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【推荐1】如图,菱形ABCD中,AC交BD于O,DE⊥BC于E,连接OE,若∠BAD=40°,则∠OED的度数为( )
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【推荐2】下列命题中:
①等腰三角形底边的中点到两腰的距离相等;②正n边形有n条对称轴(n≥3的整数);③若△ABC与△A'B'C'成轴对称,则△ABC一定与△A'B'C'全等;④等腰三角形的高、中线、角平分线互相重合;⑤等腰三角形的对称轴是顶角的平分线.
正确命题的个数是( )
①等腰三角形底边的中点到两腰的距离相等;②正n边形有n条对称轴(n≥3的整数);③若△ABC与△A'B'C'成轴对称,则△ABC一定与△A'B'C'全等;④等腰三角形的高、中线、角平分线互相重合;⑤等腰三角形的对称轴是顶角的平分线.
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【推荐1】如图,将一张长方形纸片ABCD沿AE折叠,若∠BAD′=28°,则∠AED′等于( )
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【推荐2】如图,将
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