如图,将Rt△ABC绕直角顶点B逆时针旋转90°得到△DBE,DE的延长线恰好经过AC的中点F,连接AD,CE.
(1)求证:AE=CE;
(2)若BC=
,求AB的长.
(1)求证:AE=CE;
(2)若BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2019/6/4/2218557977518080/2218922092724224/STEM/26a7884aee694ca2b96d839ffbedbfeb.png?resizew=139)
2019·福建南平·一模 查看更多[5]
【市级联考】福建省(南平 厦门 福州 漳州市)2019届九年级中考最后一卷数学模拟试题山西省晋中市灵石县2019-2020学年八年级下学期阶段测试数学试题2019年湖北省荆门市九年级学业水平适应性考试数学试题(已下线)知识梳理03 第三章 图形的平移和旋转-2020-2021学年八年级数学下学期期末专项复习(北师大版,广东专用)四川省内江市资中县公民中学2022-2023学年九年级上学期期中数学试题
更新时间:2019-06-05 09:51:27
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解答题-证明题
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名校
【推荐2】关于勾股定理的证明有一种简洁方法叫做“常春证法”,将两个全等的直角三角形
和
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适中
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【推荐1】如图是一个半圆形桥洞的截面示意图,圆心为O,直径
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解答题-证明题
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【推荐2】如图,在
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(1)求证:
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真题
【推荐1】如图,点E是矩形ABCD的边BC上一点,将△ABE绕点A逆时针旋转至△AB1E1的位置,此时E、B1、E1三点恰好共线.点M、N分别是AE和AE1的中点,连接MN、NB1.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/369672e8-78ee-4354-9b5b-86de08fc0095.png?resizew=191)
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解答题-计算题
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【推荐2】(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503690b529969858a4070cb1683fe561.png)
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