问题: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
,则线段
,
,
之间满足的等量关系式为 ;
探索:如图②,在
与
中,
,
,将
绕点
旋转,使点
落在
边上,试探索线段
,
,
之间满足的等量关系,并证明你的结论;
应用:如图③,在四边形
中,
.若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.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/c02b54dc6b3e1bb6544f47d4c8743fcf.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/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
探索:如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e7ba6e267dde1a65a98f9f36b585ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a91778530fee017af63165397d36b4.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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
应用:如图③,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/970b44cb9502afc03a1be8761b3fd601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ec4f71a8caf880bca7574f122f07fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9723635d46664a92d3af26362dfea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
更新时间:2024-05-21 21:44:30
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】(1)问题发现
如图1,△ACB和△DCE均为等边三角形,点A,D,E在同一直线上,连接BE,求∠AEB的度数.
(2)拓展探究
如图2,△ACB和△DCE均为等腰直角三角形,
,点A、D、E在同一直线上,CM为△DCE中DE边上的高,连接BE.请求∠AEB的度数及线段CM,AE,BE之间的数量关系,并说明理由.
如图1,△ACB和△DCE均为等边三角形,点A,D,E在同一直线上,连接BE,求∠AEB的度数.
(2)拓展探究
如图2,△ACB和△DCE均为等腰直角三角形,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3307a91a931a4cf4755854b5ef33d1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/5ba9a05f-af43-43d9-ab18-32a1d0d026c5.png?resizew=243)
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解答题-证明题
|
较难
(0.4)
【推荐2】如图1,把一个含45°角的直角三角板ECF和一个正方形ABCD摆放在一起,使三角板的直角顶点和正方形的顶点C重合,点E、F分别在正方形边CB、CD上,连接AF,取AF中点M,EF的中点N,连接MD、MN.
(1)连接AE,则△AEF是 三角形,MD、MN的数量关系是 .
(2)如图2,将图1中的直角三角板ECF绕点C顺时针旋转180°,其他条件不变,则MD、MN的数量关系还成立吗?若成立,请加以证明;若不成立,请说明理由.
(3)将图1中正方形ABCD及直角三角板ECF同时绕点C顺时针旋转90°,如图3,其他条件不变,则MD、MN的数量关系还成立吗?若成立,请加以证明;若不成立,请说明理由.
.
(1)连接AE,则△AEF是 三角形,MD、MN的数量关系是 .
(2)如图2,将图1中的直角三角板ECF绕点C顺时针旋转180°,其他条件不变,则MD、MN的数量关系还成立吗?若成立,请加以证明;若不成立,请说明理由.
(3)将图1中正方形ABCD及直角三角板ECF同时绕点C顺时针旋转90°,如图3,其他条件不变,则MD、MN的数量关系还成立吗?若成立,请加以证明;若不成立,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/4ed25374-2d9d-4afe-846b-ad71ecc89a01.png?resizew=483)
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解答题-证明题
|
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【推荐1】已知点P为正方形ABCD的边BC上任意一点,连接AP,过点B作BE⊥AP于点E,使EF=AE,连接BE.
(1)如图①,求证:BF=BC;
(2)如图②,∠CBF的平分线交AF于点G,连接DG,求证
;
(3)若正方形的边长为2,当点P为BC的中点时,连接CF,求CF的长.
(1)如图①,求证:BF=BC;
(2)如图②,∠CBF的平分线交AF于点G,连接DG,求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596497a9efdd7edc6858c8531aaa35e0.png)
(3)若正方形的边长为2,当点P为BC的中点时,连接CF,求CF的长.
![](https://img.xkw.com/dksih/QBM/2021/5/15/2721353187680256/2722172998533120/STEM/c07de75d-3611-411e-b44f-4a46a48afa48.png)
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【推荐2】在
中,
,点
分别是边
的中点,点
为直线
上一动点,连接
,将线段
绕点
逆时针旋转
,得到线段
,连接
.
(1)如图1,当
时,请直接写出线段
和线段
之间的数量关系;
(2)如图2,当
时,其它条件不变,(1)的结论是否仍然成立?若成立,请利用图2证明;若不成立,请说明理由;
(3)在(2)的条件下,若
,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47838c89d27c39158558a5b111d885d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a351748a76770f00bee4314fa01922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712453574811648/2717414231007232/STEM/b4f3671e-10b8-46fb-80a4-d9e3f5b40919.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
名校
【推荐1】四边形
是正方形,将线段
绕点
逆时针旋转
到线段
,连接
,过点
作
交
于
,连接
.
![](https://img.xkw.com/dksih/QBM/2022/1/24/2901409320116224/2901966405230592/STEM/1140fdde088346b181b549d757f411f8.png?resizew=381)
(1)依题意补全图1;
(2)求
的度数;
(3)取
、
的中点,分别记为
、
,连接
,
,猜想线段
与
的关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451f24fd675cac7112e4ffd6a94f189d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7a3dc3f3a02f4400e22dec2f2fee23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2022/1/24/2901409320116224/2901966405230592/STEM/1140fdde088346b181b549d757f411f8.png?resizew=381)
(1)依题意补全图1;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3f19ab76b27b47aeaaf4a66f0e580b.png)
(3)取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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解答题-证明题
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较难
(0.4)
【推荐2】综合与实践:如图,
中,
,
,
,把
绕点
逆时针旋转
到
的位置,点
,
的对应点分别是
,
,
与
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/4bf83a92-4864-45f2-9ff0-427438eec7a7.png?resizew=590)
(1)如图1,当
时,猜测
与
的数量关系,并加以证明.
(2)如图2,当
时,连接
,求
的长度.
(3)在旋转过程中,若
是等腰三角形,请你直接写出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585801c84bd48db2f388efd337750c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b185184dc2dc3894a0313fd13f26a59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/4bf83a92-4864-45f2-9ff0-427438eec7a7.png?resizew=590)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499c04aaca58c36c36430c2028103552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfdb87470309fa4521c5f073298377e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
(3)在旋转过程中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次