已知:点A(4,0),点B是y轴正半轴上一点,如图1,以AB为直角边作等腰直角三角形ABC.
(1)当点B坐标为(0,1)时,求点C的坐标;
(2)如图2,以OB为直角边作等腰直角△OBD,点D在第一象限,连接CD交y轴于点E.在点B运动的过程中,BE的长是否发生变化?若不变,求出BE的长;若变化,请说明理由.
更新时间:2017-03-04 14:54:12
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解答题-问答题
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解题方法
【推荐1】如图所示,
的边
在
轴上,点
在
轴上.已知
,
,
,从
点出发的点
,以每秒1个单位的速度向点
移动.
是
的中点,
的延长线交
于点
.
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759739221073920/2802847383543808/STEM/6e14a836-63e6-4489-b879-7e89497ba744.png?resizew=307)
(1)求点
,
的坐标.
(2)当四边形
是平行四边形时,求点
的移动时间
(秒).
(3)当
为等腰三角形时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc840e197de2dabff676ee1b8968fada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2d3f02cb9007cd4a90ea30f6dd8181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93380ab8eccc6e6f11bdf19ffc2d4cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759739221073920/2802847383543808/STEM/6e14a836-63e6-4489-b879-7e89497ba744.png?resizew=307)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d1a8ed65b138016acff8c465165337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44ca79d5e12bd02c393ba7f0b31c8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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名校
【推荐2】在平面直角坐标系
中,对于任意两点
与
,我们重新定义这两点的“距离”:
①当
时,
为点
与点
的“远距离”
,即
;
当
时,
为点
与点
的“远距离”
,即
.
②点
与点
的“总距离”
为
与
的和,即
.
![](https://img.xkw.com/dksih/QBM/2023/5/1/3228302016921600/3229134874386432/STEM/86c88933dcd34a1897903daaf3dd10d4.png?resizew=455)
根据以上材料,解决下列问题:
(1)已知点
,则
______.
(2)若点
在第一象限,且
.求点B的坐标.
(3)①若点
,且
,所有满足条件的点C组成了图形G,请在图1中画出图形G;
②已知点
,
,若在线段
上存在点E,使得点E满足
且
,请直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b225d772013d021cf1bfe7b9421fa5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b7e35faab6d74fa0c36599c39d1698.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c2f42c247568ba2a6b4bc9bb698abf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6abf3f9b0ebcdc47a028c781b7edb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36049e0d2e127c34a557cd3f5738950c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28531269855025a49d05d9f4c13dbc40.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15eb058fd541ce187fd97cc5cd07f2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0761e63cb3a4113d50f6bf808cdc031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36049e0d2e127c34a557cd3f5738950c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbbb2821b296b12c96e5f005baef2ff4.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6b57ff4cd81f86acae25b2cad027c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6abf3f9b0ebcdc47a028c781b7edb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0761e63cb3a4113d50f6bf808cdc031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8809b4af847c8373e717268ec17d7c1c.png)
![](https://img.xkw.com/dksih/QBM/2023/5/1/3228302016921600/3229134874386432/STEM/86c88933dcd34a1897903daaf3dd10d4.png?resizew=455)
根据以上材料,解决下列问题:
(1)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ef909d25c9b62dc9ce23e6ac1ee9e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12329f1d09c02956ac67571e466f6a68.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c082b99126621f10157b551adf636db5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ecd05a29da9a575a4439cad5c27ba55.png)
(3)①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3559ad2187d15e7a9ef391015f206627.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6349e6a758f79548130db730a563c9f8.png)
②已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dba6ef0c00b3442464e6d0f39cf5c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e1eb09538cd1b3dbd9f5e0c5c30fc05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920154e67bf9a4c8d15bf7ce5f38518f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed836a0c7190c70b155da8be28c1aa8.png)
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【推荐1】小亮同学喜欢研究数学问题.他在一本资料中看到一个新的数学概念“对角线互相垂直且相等的四边形叫做垂等四边形”,并对垂等四边形进行了研究.具体内容如下:
(1)如图1,在平面直角坐标系
中,已知四边形
是垂等四边形,点
的坐标为
,点
的坐标为
,求点
的坐标;
【规律初探】
(2)如图2,正方形
的边长为
,点
在边
上,点
在边
上,点
在边
上,点
在边
上,若四边形满足
,请直接写出四边形
面积S的取值范围;
【综合探究】
(3)如图3,已知抛物线
与
轴交于
、
两点,点
在点
的左侧,
、
两点在该抛物线上.若以
、
、
、
为顶点的四边形是垂等四边形且
.设点
的横坐标为
,点
的横坐标为
,且
,求m的值.
(1)如图1,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cfa2a6d9749a619edf80bad8b3e4962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fed700b7a3ab2ee7fbae12507033af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
【规律初探】
(2)如图2,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9016de3d17a389fb5d0952f616c19e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
【综合探究】
(3)如图3,已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3236d825b994ee9c28e5d5479a57b8ed.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947aed0181a8c0bd81c6ebeba8d1ddc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7091d529281abff275ef19b9197445a7.png)
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【推荐2】已知,在正方形ABCD中,点M、N为对角线AC上的两个动点,且∠MBN=45°,过点M、N分别作AB、BC的垂线相交于点E,垂足分别为F、G,设△AFM的面积为S1,△NGC的面积为S2,△MEN的面积为S3.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975841808269312/2977711874113536/STEM/58fc5463e5ee498fa40854479ec99c8c.png?resizew=486)
(1)如图(1),当四边形EFBG为正方形时,
①求证:△AFM≌△CGN;
②求证:S3=S1+S2.
(2)如图(2),当四边形EFBG为矩形时,写出S1,S2,S3三者之间的数量关系,并说明理由;
(3)在(2)的条件下,若BG:GC=m:n(m>n),请直接写出AF:FB的值.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975841808269312/2977711874113536/STEM/58fc5463e5ee498fa40854479ec99c8c.png?resizew=486)
(1)如图(1),当四边形EFBG为正方形时,
①求证:△AFM≌△CGN;
②求证:S3=S1+S2.
(2)如图(2),当四边形EFBG为矩形时,写出S1,S2,S3三者之间的数量关系,并说明理由;
(3)在(2)的条件下,若BG:GC=m:n(m>n),请直接写出AF:FB的值.
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【推荐1】如图,等腰
中,∠BAC=45度,AB=AC,CD⊥AB.点P为线段BC上的动点,过点P作PH⊥BC,PH交线段AC于点E,交线段CD于点F.
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597711293497344/2598695350067200/STEM/cf96c1b632a34131bd7ce28f8d53f595.png?resizew=207)
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597711293497344/2598695350067200/STEM/3daa7636129f4682b170ce08e8a68e7d.png?resizew=212)
(1)请在图1中将图形补充完整,并探究CP于EF的数量关系.
(2)若将上述条件中“PH交线段AC于点E”,改为 “PH交线段CA延长线于点E”,你在(1)中得到的结论是否成立,若成立,请在图2中画图并证明;若不成立,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597711293497344/2598695350067200/STEM/cf96c1b632a34131bd7ce28f8d53f595.png?resizew=207)
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597711293497344/2598695350067200/STEM/3daa7636129f4682b170ce08e8a68e7d.png?resizew=212)
(1)请在图1中将图形补充完整,并探究CP于EF的数量关系.
(2)若将上述条件中“PH交线段AC于点E”,改为 “PH交线段CA延长线于点E”,你在(1)中得到的结论是否成立,若成立,请在图2中画图并证明;若不成立,请说明理由.
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【推荐2】在
中,点
是线段
上一动点,连接
.将线段
绕点
逆时针旋转至
, 记旋转角为
, 连接
.取
的中点为点
, 连接
.
(1)如图
, 已知
是等腰直角三角形,
,
,
.延长
至点
,使
,连接
.请直接写出
与
的数量关系 ,
与
的数量关系 .
【类比迁移】
(2)如图
, 已知
是等腰三角形,
,
,
.探究线段
与
的数量关系,并证明你的结论.
【拓展应用】
(3)如图
, 已知在
中,
,
,
,
.在点
的运动过程中,求线段
长度的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8256a7aded59ef1150eb874a4eecdab0.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
【类比迁移】
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
【拓展应用】
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df049f15adb6667113ceee3a6638cd0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f186ea827f7becafd1ac4955e22c6812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c279a8ba132d374d8340257450732d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,Rt△ABC≌Rt△DFE,其中∠ACB=∠DFE=90°,BC=EF.
(1)若两个三角形按图2方式放置,AC、DF交于点O,连接AD、BO,则AF与CD的数量关系为 ,BO与AD的位置关系为 ;
(2)若两个三角形按图3方式放置,其中C、B(D)、F在一条直线上,连接AE,M为AE中点,连接FM、CM.探究线段FM与CM之间的关系,并证明;
(3)若两个三角形按图4方式放置,其中B、C(D)、F在一条直线上,点G、H分别为FC、AC的中点,连接GH、BE交于点K,求证:BK=EK.
(1)若两个三角形按图2方式放置,AC、DF交于点O,连接AD、BO,则AF与CD的数量关系为 ,BO与AD的位置关系为 ;
(2)若两个三角形按图3方式放置,其中C、B(D)、F在一条直线上,连接AE,M为AE中点,连接FM、CM.探究线段FM与CM之间的关系,并证明;
(3)若两个三角形按图4方式放置,其中B、C(D)、F在一条直线上,点G、H分别为FC、AC的中点,连接GH、BE交于点K,求证:BK=EK.
![](https://img.xkw.com/dksih/QBM/2019/1/19/2122062737620992/2122875568111616/STEM/ca515d93289b4a12acf265b77720adf0.png?resizew=476)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】在矩形
中,点E、F分别在边
、
上,且
,
,将矩形
沿直线
折叠,使点D恰好与点B重合,点C落在点
处,如图1.
![](https://img.xkw.com/dksih/QBM/2023/1/15/3153286264520704/3156771028860928/STEM/3914ffa112794dc68b27a7db2504e6b0.png?resizew=424)
(1)求证:
;
(2)点P为线段
上一动点,过点P作
、
,以
、
为邻边构造平行四边形
,如图2.
①求平行四边形
的周长.
②当点P从点E运动到点F时,求出点Q的运动路径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f341b98caabf99bc683ce8407068735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93bc4c9dd737193f7acce692b23500d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://img.xkw.com/dksih/QBM/2023/1/15/3153286264520704/3156771028860928/STEM/3914ffa112794dc68b27a7db2504e6b0.png?resizew=424)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
(2)点P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c66bcf586a90c2605dd418ce5de4fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24814e56a8175afbb4b241634b370ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c8dc6a450164f624e4b24d01e2f40f.png)
①求平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c8dc6a450164f624e4b24d01e2f40f.png)
②当点P从点E运动到点F时,求出点Q的运动路径长.
您最近一年使用:0次