如图,正方形
的边
,
在坐标轴上,点
的坐标为
.点
从点
出发,以每秒
个单位长度的速度沿
轴向点
运动;点
从点
同时出发,以相同的速度沿
轴的正方向运动,规定点
到达点
时,点
也停止运动.连接
,过
点作
的垂线,与过点
平行于
轴的直线相交于点
,
与
轴交于点
,连接
.设点
运动的时间为
(
).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/bcf84ef2-aef5-428a-ae70-bda18c5f6323.png?resizew=181)
(1)写出
的度数和点
的坐标(点
的坐标用
表示).
(2)探索
周长是否随时间
的变化而变化,若变化,说明理由;若不变,试求这个定值.
(3)当何值时,
为等腰三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd97f6498211e30d01c2f092c1fbf54b.png)
![](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/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65502a7ea4d1ce6d6d8c720845c73e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/bcf84ef2-aef5-428a-ae70-bda18c5f6323.png?resizew=181)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e98f2e85bdf9c6669c14f8966ed53be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)探索
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b98bec817e96fba365ba496ad3b9af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6accdd9b317c922d335e44911df357.png)
更新时间:2021-03-17 19:24:10
|
相似题推荐
解答题-作图题
|
较难
(0.4)
名校
【推荐1】如图1,在矩形ABCD中,
,
,点E在边CD上,
,点F是线段AE上一点,连接
.
(1)连接
,请用尺规作图法作
,垂足为G点(保留作图痕迹,不要求写出作法).若
,求线段
的长.
(2)如图2,若
,AE的延长线与BC的延长线交于点H,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119e125552950c830851dbaec5e7f159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/25/9f9275c0-d04e-42c6-9056-b3f16d7461bc.png?resizew=405)
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa106172cc7b3db22ebbcbc1fe84c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c49249e2afecb98e38aa99414d899cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3429f328cde5aa2654fcf38c3b6d4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】在矩形ABCD中,点E在边BC上,连接AE.
![](https://img.xkw.com/dksih/QBM/2020/12/23/2620451268911104/2624646841090048/STEM/24e9adff-7397-45a6-a056-396dca642549.png?resizew=495)
(1)如图①,当矩形ABCD为正方形时,将
沿AE翻折得到
,连接EF并延长交边CD于点G,连接AG.求证:
;
(2)如图②,在矩形ABCD的边CD上取一点G,连接AG,使
.
①若
,
,
,则
____(直接填空);
②过点G作
,交AE于点H,如图③,若
,请直接写出线段GH、BE、DG之间的数量关系.
![](https://img.xkw.com/dksih/QBM/2020/12/23/2620451268911104/2624646841090048/STEM/24e9adff-7397-45a6-a056-396dca642549.png?resizew=495)
(1)如图①,当矩形ABCD为正方形时,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2698f08d94afa1cd5b81444791f4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0638ba7cde29c89dbc8f8313ef4c044d.png)
(2)如图②,在矩形ABCD的边CD上取一点G,连接AG,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54c516dce8408f83411b114a3387bea.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e691e76614be733eee2f2845b298847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f76e37d6e6b182896ccaaa187cfe07.png)
②过点G作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f640011d3c23f2da52fb406362a25312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/426882006613779cc2191aa3b0d63801.png)
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解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐1】如图,在边长为2的正方形ABCD中,G是AD延长线上的一点,且DG=AD,动点M从A点出发,以每秒1个单位的速度沿着A→C→G的路线向G点匀速运动(M不与A,G重合),设运动时间为t秒,连接BM并延长交AG于N.
(1)当AM=_____________时,△ABM是以AB为底边的等腰三角形;
(2)当点N在AD边上时,若BN⊥HN,NH交∠CDG的平分线于H,求证:BN=HN;
(3)过点M分别作AB,AD的垂线,垂足分别为E,F,矩形AEMF与△ACG重叠部分的面积为S,求S与t的函数关系式,并求S最大值.
(1)当AM=_____________时,△ABM是以AB为底边的等腰三角形;
(2)当点N在AD边上时,若BN⊥HN,NH交∠CDG的平分线于H,求证:BN=HN;
(3)过点M分别作AB,AD的垂线,垂足分别为E,F,矩形AEMF与△ACG重叠部分的面积为S,求S与t的函数关系式,并求S最大值.
![](https://img.xkw.com/dksih/QBM/2020/7/3/2497927898865664/2498552956436480/STEM/e7cd22c9fcfc477e8f64dc6bd055e652.png?resizew=232)
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解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】如图,直线
交两坐标轴于点
.
的解析式;
(2)点
的坐标为
,连接
.证明:
,且线段
;
(3)在(2)的条件下,点
为平面直角坐标系内一点,当四边形
为正方形时,请直接写出点
的坐标.
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(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed3636ebd750003453533da1463036b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
(3)在(2)的条件下,点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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