如图
,在平面直角坐标系
中,
为等腰直角三角形,
,直角顶点
在轴上,点
在
轴上,点
在第二象限,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/1c4bf98e-27d9-4962-94dc-1b95d005ebb8.jpg?resizew=430)
(1)在线段
上找一点
,使得
,连接
、
,求证:
;
(2)将
绕点
逆时针旋转,使得点
落在
轴正半轴上.
如图
,
轴恰好平分
,
与
轴交于点
,过点
作
轴于点
,则
与
有怎样的数量关系?并说明理由,
如图
,直角边
在两坐标轴上滑动,使点
在第四象限内,过点
作
轴于点下,在滑动的过程中,
是否为定值?若是,请直接写出答案;若不是,请说出理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ca0f2b2b40440365fcce22ac32c0ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9259d384fe67d6df28e183cebad894ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/1c4bf98e-27d9-4962-94dc-1b95d005ebb8.jpg?resizew=430)
(1)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/442d4e778cf1a1ec0438658816dfc9ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc369fbf82772a3b22216fe20d16a186.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd6ac1314d0471caed35f9688d20b03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715d55d3441ce4df008c4d7ca4547ac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229dbeea774944c4b42e7b340a63a29c.png)
更新时间:2023-12-28 18:37:12
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】已知四边形
是正方形,点
点
分别是边
所在的直线上的点,
,连接
,
与直线
相交于点H.过点
作
,并且使
,连接
.
,当点
点
分别在
边上时,
与
的数量关系是________,位置关系是________;
(2)如图
,当点
点
分别在
延长线上时,(
)中结论是否仍然成立?若成立,请予以证明;若不成立,请说明理由;
(3)如图
,当点
点
分别在
延长线时,(
)中结论是否仍然成立?请直接写出你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a218df45c6bfd2d627879bb5509bd482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdba2ac1a72eea482f5578843e00357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533f1f6ead0d794bb7c70cce9173d4a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b795e2cfa58b494fd8f5437b3db0d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5024eaafc4d7abdf98af69932cc5c76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/240100a92f24e93269f1c74ae742b121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a218df45c6bfd2d627879bb5509bd482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdba2ac1a72eea482f5578843e00357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a218df45c6bfd2d627879bb5509bd482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83f327982ed5868833a895a1b3d1e592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a218df45c6bfd2d627879bb5509bd482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdba2ac1a72eea482f5578843e00357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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【推荐2】如图1,在平面直角坐标系中,
是等腰直角三角形,且
,点A为y轴正半轴上一点,且满足
,点B为
的延长线与x轴的交点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/bb63c04a-f395-40c3-a12e-a907115b91f7.png?resizew=575)
(1)求点B的坐标;
(2)在(1)的条件下,如图2,点E为y轴正半轴上一点,连接
,过点B作
且
.连接
交x轴于点G,若
,求点E的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9655a163585f7af24b137246ac20a01b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c828839ec7daffe75d61c24298afe7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3dfcd8aff269dd5aba398816490c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/bb63c04a-f395-40c3-a12e-a907115b91f7.png?resizew=575)
(1)求点B的坐标;
(2)在(1)的条件下,如图2,点E为y轴正半轴上一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd8f551c92c15ad3bb09f9aa470496b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01009f2f3a3476fd1efe90291083132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a3bb40a13fed6406d48dd8b12532c5.png)
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名校
【推荐3】【阅读材料】:
(1)在
中,若
,由“三角形内角和为180°”得
.
(2)在
中,若
,由“三角形内角和为180°”得
.
【解决问题】:
如图①,在平面直角坐标系中,点C是x轴负半轴上的一个动点.已知
轴,交y轴于点E,连接CE,CF是∠ECO的角平分线,交AB于点F,交y轴于点D.过E点作EM平分∠CEB,交CF于点M.
(1)试判断EM与CF的位置关系,并说明理由;
(2)如图②,过E点作PE⊥CE,交CF于点P.求证:∠EPC=∠EDP;
(3)在(2)的基础上,作EN平分∠AEP,交OC于点N,如图③.请问随着C点的运动,∠NEM的度数是否发生变化?若不变,求出其值:若变化,请说明理由.
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f1898d61cbfe123a5bb8a8996fa2ae3.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/225c56a2c4e5d00893595b161b9b5481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec08470bd43f329c2d6016b4214bc9f.png)
【解决问题】:
如图①,在平面直角坐标系中,点C是x轴负半轴上的一个动点.已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcb94c4a46f48f243f98768a5ee34a4.png)
(1)试判断EM与CF的位置关系,并说明理由;
(2)如图②,过E点作PE⊥CE,交CF于点P.求证:∠EPC=∠EDP;
(3)在(2)的基础上,作EN平分∠AEP,交OC于点N,如图③.请问随着C点的运动,∠NEM的度数是否发生变化?若不变,求出其值:若变化,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/9/7/2544426276585472/2547418263330816/STEM/f5419f409bd147089759ab662d213124.png?resizew=560)
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【推荐1】综合与实践课上,老师让同学们以“正方形的折叠”为主题开展数学活动.
【操作判断】
操作一;如图1,正方形纸片
,将
沿过点A的直线折叠,使点B落在正方形
的内部,得到折痕
,点B的对应点为M,连接
;将
沿过点A的直线折叠,使
与
重合,得到折痕
,将纸片展平,连接
.
①
;
②线段
,
,
之间的数量关系为 .
【深入探究】
操作二:如图2、将
沿
所在直线折叠,使点C落在正方形
的内部,点C的对应点为N,将纸片展平,连接
、
.
同学们在折纸的过程中发现,当点E的位置不同时,点N的位置也不同,当点E在
边上某一位置时(点E不与点B,C重合),点N恰好落在折痕
上,此时
交
于点P,如图3所示.
(2)小明通过观察图形,得出这样两个结论:①
;②
.请任意选择其中一个结论判断其是否正确,并说明理由.
(3)【拓展应用】若正方形纸片
的边长为3,当点N落在折痕
或
上时,请直接写出线段
的长.
【操作判断】
操作一;如图1,正方形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e569f82eb96d237501ed0fba536e9ac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
②线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
【深入探究】
操作二:如图2、将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
同学们在折纸的过程中发现,当点E的位置不同时,点N的位置也不同,当点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
(2)小明通过观察图形,得出这样两个结论:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61b73d791aa68c86e6ff9adea9a0177.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f57b8380e1c9d059087e2bd121153f.png)
(3)【拓展应用】若正方形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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【推荐2】已知:如图(1),在△ABC中,AB=BC=2CD,∠ABC=∠DCB=120°,AC交BD于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/11/9604460c-8e94-4d26-8e98-08a4d0c523f9.png?resizew=632)
(1)如图1:作BM⊥CA于M,求证:△DCE≌△BME;
(2)如图2:点F为BC中点,连接AF交BD于点G,当AB=a时,求FG的长度(用含a的代数式表示);
(3)如图3:在(2)的条件下,将△ABG沿AG翻折得到△AKG,延长AK交BD于点H,若BH=5,求CE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/11/9604460c-8e94-4d26-8e98-08a4d0c523f9.png?resizew=632)
(1)如图1:作BM⊥CA于M,求证:△DCE≌△BME;
(2)如图2:点F为BC中点,连接AF交BD于点G,当AB=a时,求FG的长度(用含a的代数式表示);
(3)如图3:在(2)的条件下,将△ABG沿AG翻折得到△AKG,延长AK交BD于点H,若BH=5,求CE的长.
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【推荐1】某数学兴趣小组开展了一次活动,过程如下:设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ed15020c1c669e06a3a3b1557242e9.png)
,现把小棒依次摆放在两射线之间,并使小棒两端分别落在射线AB、AC上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/e71cc593-9741-4610-85f1-17f36555d96c.png?resizew=679)
活动一:
如图甲所示,从点
开始,依次向右摆放小棒,使小棒与小棒在端点处互相垂直,
为第1根小棒.
数学思考:
(1)小棒能无限摆下去吗?答:___________.(填“能”或“不能”)
(2)设
,
=___________;
活动二:
如图乙所示,从点A1开始,用等长的小棒依次向右摆放,其中A1A2为第1根小棒,且A1A2=AA1.
数学思考:
(3)若已经摆放了3根小棒,
__________;(用含的式子表示)
(4)若只能摆放5根小棒,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ed15020c1c669e06a3a3b1557242e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6eb7dcf70d5e716e2c895d45838ba98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/e71cc593-9741-4610-85f1-17f36555d96c.png?resizew=679)
活动一:
如图甲所示,从点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473913c0887bb64d386f4c02f1853452.png)
数学思考:
(1)小棒能无限摆下去吗?答:___________.(填“能”或“不能”)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c224b06e9deeb1ab7978584dbf7ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
活动二:
如图乙所示,从点A1开始,用等长的小棒依次向右摆放,其中A1A2为第1根小棒,且A1A2=AA1.
数学思考:
(3)若已经摆放了3根小棒,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24e7f61c6ec8bf9645cc364bb35edfb.png)
(4)若只能摆放5根小棒,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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【推荐2】抛物线
(
,
为常数,
)顶点为
,与
轴交于点
,
(点
在点
左侧),与
轴交于点
,直线
过点
且平行于
轴,
为第一象限内直线
上一动点,
为线段
上一动点.
(1)若
,
.
①求点
和点
,
的坐标;
②当点
为直线
与抛物线的交点时,求
的最小值;
(2)若
,
,且
的最小值等于
时,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc5ccf9df767bb1f45c668bf4bc6df87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
①求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef7afc34443473b44d781a5d06bff02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a7847bff0073127f10ec3925127414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011f66c884442a8fc55829d46c71924d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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解答题-作图题
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较难
(0.4)
【推荐3】定义:如果1条线段将一个三角形分割成2个等腰三角形,我们把这条线段叫做这个三角形的“双等腰线”.如果2条线段将一个三角形分成3个等腰三角形,我们把这2条线段叫做这个三角形的“三等腰线”.如图1,
是
的“双等腰线”,
是
的“三等腰线”.
(1)请在下面三个图中,分别作出
的“双等腰线”,并做必要的标注或说明.
①
;②
;
(2)如果一个等腰三角形有“双等腰线”,那么它的底角度数是 .
(3)如图3,
中,
.画出
所有可能的“三等腰线”,使得对
取值范围的任意值都成立,并做必要的标注或说明.(每种可能用一个图单独表示,如果图不够用可以自己补充)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba83afe4ade6624b283331a18bdf2ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/22/4fc4ce44-aea1-411c-bb80-0ca7a7e2fdc1.png?resizew=183)
(1)请在下面三个图中,分别作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23daff75a3fa5364e91210b320b41896.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/22/5daa8787-f912-4c4f-93ad-3e7a1fb42ead.png?resizew=480)
(2)如果一个等腰三角形有“双等腰线”,那么它的底角度数是 .
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9254c852fe73888cf49ffcb7c03ecb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/22/945e77c0-3161-44e9-a59f-73f92e02597b.png?resizew=252)
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