如图,将
的直角三角尺
绕点B顺时针旋转
后得到
,连接
.若
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8f3a8b0608ec011ad95c522fd2ea4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96715995549e5e48494101570bb3bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
22-23八年级下·新疆喀什·期末 查看更多[4]
新疆维吾尔自治区喀什地区2022-2023学年八年级下学期期末数学试题新疆维吾尔自治区喀什地区2022-2023学年八年级下学期期中数学试题(已下线)第3章 图形的平移与旋转常考易错(10个考点40题专练)-2023-2024学年八年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(北师大版)(已下线)北师大版八年级期末真题必刷易错60题(52个考点专练)-2023-2024学年八年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(北师大版)
更新时间:2023-08-15 22:07:17
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【推荐1】如图,在△ABC中,AB=AC,尺规作图:(1)分别以B,C为圆心,BC长为半径作弧,两弧交于点D;(2)连接DB、DA、DC,DA交BC于点E,则下列结论中错误的是( )
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A.AD垂直平分BC |
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C.若∠BAC=120°,则DE=3AE |
D.若∠BAC=60°,则BC垂直平分AD |
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【推荐2】如图,在边长为3的菱形
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