在等腰直角
中,
点E为
内部一点,将线段BE绕点B顺时针旋转90°得到BF,连结AE、CF. 求证:
![](https://img.xkw.com/dksih/QBM/2021/12/28/2889276565413888/2904344751513600/STEM/1ec695454a7249b6a32fac501b36741e.png?resizew=161)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514286f9c3804e8668a6862482da4066.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1e2816b2af2bb133e9910c6d94de3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://img.xkw.com/dksih/QBM/2021/12/28/2889276565413888/2904344751513600/STEM/1ec695454a7249b6a32fac501b36741e.png?resizew=161)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514286f9c3804e8668a6862482da4066.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b948b7a0d57d917042973734ed69910e.png)
更新时间:2022-01-28 19:27:26
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】某数学托管兴趣小组对图形的旋转进行了如下探究:
【特例发现】
(1)如图①,在
中,
,
,
为
边上一点(不与点
、
重合),将线段
绕点
逆时针旋转
得到
,连接
,试探索线段
,
,
之间满足的等量关系,并证明你的结论;
【类比探究】
(2)如图②,在
与
中,
,
,
,
,将
绕点
旋转,使点
落在
边上,连接
,试探索线段
,
,
之间满足的等量关系,并证朋你的结论;
【迁移应用】
(3)如图③,在四边形
中,
.若
,
,求
的长
【特例发现】
(1)如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
【类比探究】
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c50d6d16f99c65005dfb950c30d760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
【迁移应用】
(3)如图③,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2894a6ff5b198184fffcaa1d03a33227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7650cede07c4758a9b3bb1da4553acc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/7db887c9-83bd-4419-bec3-28b0b2354b87.png?resizew=520)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,
,
,
,将
绕点B顺时针旋转60°得到
,连接
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0154169c1d46d4364a87bf190cf85a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c46d6d34aca0d8ef6271db305269da.png)
![](https://img.xkw.com/dksih/QBM/2023/3/3/3186488870789120/3188771544293376/STEM/cf3919c95cb6422ba22d482f3b471c36.png?resizew=151)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,将矩形
绕点C顺时针旋转得到矩形
,点B与点E对应,点E恰好落在
边上,
交于点H,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3190817cb33e1f1c63d5c71da6b1a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ec87213cf33e3725380f5ac704be2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cabcdec22046c096e34a1c9eb450bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/997b92d9-8235-4825-9222-ef6432a88db3.png?resizew=153)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在
中,
,
,
,以AC为腰,点A为顶点作等腰
,且
,则
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe4b11887a8a3c930c9634527709201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/a5c4130b-2e7b-48fa-8d5a-f0a6cd13f6f7.png?resizew=120)
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解答题-证明题
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适中
(0.65)
【推荐3】阅读下列材料:
问题:如图(1),已知正方形ABCD中,E、F分别是BC、CD边上的点,且∠EAF =45°. 判断线段BE、EF、FD之间的数量关系,并说明理由.
小明同学的想法是:已知条件比较分散,可以通过旋转变换将分散的已知条件集中在一起,于是他将△DAF绕点A顺时针旋转90°,得到△BAH,然后通过证明三角形全等可得出结论.
![](https://img.xkw.com/dksih/QBM/2021/12/3/2864607496159232/2868956965552128/STEM/6969ee73-2e05-4097-a439-e87bdbfb8cb2.png?resizew=407)
请你参考小明同学的思路,解决下列问题:
(1)如图(1)中线段BE、EF、FD之间的数量关系是 ;
(2)如图(2),已知正方形ABCD边长为5,E、F分别是BC、CD边上的点,且∠EAF=45°,AG⊥EF于点G,则AG的长为 ,△EFC的周长为 ;
(3)如图(3),已知△AEF中,∠EAF=45°,AG⊥EF于点G,且EG=2,GF=3,求△AEF的面积.写出解答过程.
问题:如图(1),已知正方形ABCD中,E、F分别是BC、CD边上的点,且∠EAF =45°. 判断线段BE、EF、FD之间的数量关系,并说明理由.
小明同学的想法是:已知条件比较分散,可以通过旋转变换将分散的已知条件集中在一起,于是他将△DAF绕点A顺时针旋转90°,得到△BAH,然后通过证明三角形全等可得出结论.
![](https://img.xkw.com/dksih/QBM/2021/12/3/2864607496159232/2868956965552128/STEM/6969ee73-2e05-4097-a439-e87bdbfb8cb2.png?resizew=407)
请你参考小明同学的思路,解决下列问题:
(1)如图(1)中线段BE、EF、FD之间的数量关系是 ;
(2)如图(2),已知正方形ABCD边长为5,E、F分别是BC、CD边上的点,且∠EAF=45°,AG⊥EF于点G,则AG的长为 ,△EFC的周长为 ;
(3)如图(3),已知△AEF中,∠EAF=45°,AG⊥EF于点G,且EG=2,GF=3,求△AEF的面积.写出解答过程.
您最近一年使用:0次