在正方形
中,边长为
点
是线段
上的动点,以
为直角边在直线
的上方作等腰直角三角形
,
,其中
交
于点
,
交
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/2023/4/14/3216186219249664/3252970157563904/STEM/97e4eb130bcf436e9bbaf2e80cb0941c.png?resizew=504)
(1)如图
,①若
时,求线段
的长;
②当点
在线段
上运动时,求证:
.
(2)如图
,过点
作
交
于点
,过点
作
所在的直线于点
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd0caec008c15302ca973b8e655b748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7521601ac1fbc4a52d4fe44be9c8e88c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/2023/4/14/3216186219249664/3252970157563904/STEM/97e4eb130bcf436e9bbaf2e80cb0941c.png?resizew=504)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8470e3fbfbf3531ffea6c21bc228c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d15fa6c0d01a46436b924a0194da24.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d95b61ec1e624487162d4d739ceb48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6d5a196acdc6107c4516e86c148561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
更新时间:2023-06-05 08:47:38
|
相似题推荐
【推荐1】在矩形
中,点
是射线
上一动点,连接
,过点
作
于点
,交直线
于点
.
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729292753240064/2729309295951872/STEM/0b3ce749-207f-4589-b17e-ecc2d551aeda.png)
(1)当矩形
是正方形时,以点
为直角顶点在正方形
的外部作等腰直角三角形
,连接
.
①如图1,若点
在线段
上,则线段
与
之间的数量关系是_______,位置关系是_______;
②如图2,若点
在线段
的延长线上,①中的结论还成立吗?如果成立,请给予证明;如果不成立,请说明理由;
(2)如图3,若点
在线段
上,以
和
为邻边作平行四边形
是
中点,连接
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb91cb9a5a14169845d700fbd95890ac.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729292753240064/2729309295951872/STEM/0b3ce749-207f-4589-b17e-ecc2d551aeda.png)
(1)当矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630a21ba7a8e1b8bca73c1634cc6f74d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
①如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/589786dd7c3a2679c3230b671cd232d6.png)
②如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图3,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982af1948e2bef17eca5fe8587f15149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae89413c5f56f5d656321954de8f72e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图1,在△ABC中,AB=AC,∠BAC=90°,D为AC边上一动点,且不与点A点C重合,连接BD并延长,在BD延长线上取一点E,使AE=AB=AC,连接CE.
![](https://img.xkw.com/dksih/QBM/2022/4/3/2950072502706176/2950337964359680/STEM/388fe6c4-48ca-4a83-ab8a-7003dec154a2.png?resizew=410)
(1)若∠AED=20°,则∠CAE=______°,∠AEC=______°.
(2)若∠AED=
,小明说∠BEC一定是45°,你认为正确吗?请说明理由.
(3)如图2,过点A作AF⊥BE于点F,AF的延长线与EC的延长线交于点H,求证:EH2+CH2=2AB2.
![](https://img.xkw.com/dksih/QBM/2022/4/3/2950072502706176/2950337964359680/STEM/388fe6c4-48ca-4a83-ab8a-7003dec154a2.png?resizew=410)
(1)若∠AED=20°,则∠CAE=______°,∠AEC=______°.
(2)若∠AED=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)如图2,过点A作AF⊥BE于点F,AF的延长线与EC的延长线交于点H,求证:EH2+CH2=2AB2.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】综合与探究
如图,在平面直角坐标系
中,抛物线
经过点
,
,连接
,
为抛物线
部分上一动点(可与A,B两点重合),过点P作
轴交直线
于点M,交x轴于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/9f394d57-fb07-432d-8700-48d4d264f430.png?resizew=142)
(1)求抛物线和直线
的解析式.
(2)①求线段
的最大值.
②连接
,当
为等腰三角形时,求m的值.
如图,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29610a3415c1e795d35979a5a9ff69f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aaa597a5aa6176863eda3fdf83e181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0522607eeb42a499c0f5b040bbdd42e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/9f394d57-fb07-432d-8700-48d4d264f430.png?resizew=142)
(1)求抛物线和直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)①求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f8a33ab7b6d46fc6aa88c370e54983.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,在平面直角坐标系中,O是原点,已知A(4,3),P是y轴上的动点,当点O,A,P
三点组成的三角形为等腰三角形时,求出所有符合条件的点P坐标.
三点组成的三角形为等腰三角形时,求出所有符合条件的点P坐标.
![](https://img.xkw.com/dksih/QBM/2016/1/22/1573959940595712/1573959947083776/STEM/333005407d624f009ab08b90490341ca.png)
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1】如图1,E是正方形ABCD中CD边上的一点,以点A为中心,把
顺时针旋转α后,得到
.
(1)求α的值;
(2)当点F在BC上,且∠EAF=45°,连接EF(如图2),求证:BF+DE=EF;
(3)在(2)的前提下,连接BD,分别交AE,AF于M,N两点(如图3),试判断线段BN,MN,DM三者的关系式,请给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc727c642cbc2181476b7dd8eca471e.png)
(1)求α的值;
(2)当点F在BC上,且∠EAF=45°,连接EF(如图2),求证:BF+DE=EF;
(3)在(2)的前提下,连接BD,分别交AE,AF于M,N两点(如图3),试判断线段BN,MN,DM三者的关系式,请给出证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/843edeb4-cfbd-4ae0-824a-a1abf22d53b0.png?resizew=404)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐2】已知正方形ABCD,点E,F分别在射线AB,射线BC上,AE=BF,DE与AF交于点O.
(1)如图1,当点E,F分别在线段AB,BC上时,则线段DE与AF的数量关系是 ,位置关系是 .
(2)如图2,当点E在线段AB延长线上时,将线段AE沿AF进行平移至FG,连接DG.
①依题意将图2补全;
②小亮通过观察、实验提出猜想:在点E运动的过程中,始终有
.
小亮把这个猜想与同学们进行交流,通过讨论,形成了证明该猜想的几种想法:
想法1:连接EG,要证明
,只需证四边形FAEG是平行四边形及△DGE是等腰直角三角形.
想法2:延长AD,GF交于点H,要证明
,只需证△DGH是直角三角形.
![](https://img.xkw.com/dksih/QBM/2017/6/9/1705263322284032/1705431509966848/STEM/ba6c23625de24964b5236963af51dcdf.png?resizew=334)
图1 图2
请你参考上面的想法,帮助小亮证明
.(一种方法即可)
(1)如图1,当点E,F分别在线段AB,BC上时,则线段DE与AF的数量关系是 ,位置关系是 .
(2)如图2,当点E在线段AB延长线上时,将线段AE沿AF进行平移至FG,连接DG.
①依题意将图2补全;
②小亮通过观察、实验提出猜想:在点E运动的过程中,始终有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26d44ac4182cfaca5afdab63543b65d.png)
小亮把这个猜想与同学们进行交流,通过讨论,形成了证明该猜想的几种想法:
想法1:连接EG,要证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26d44ac4182cfaca5afdab63543b65d.png)
想法2:延长AD,GF交于点H,要证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26d44ac4182cfaca5afdab63543b65d.png)
![](https://img.xkw.com/dksih/QBM/2017/6/9/1705263322284032/1705431509966848/STEM/ba6c23625de24964b5236963af51dcdf.png?resizew=334)
图1 图2
请你参考上面的想法,帮助小亮证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26d44ac4182cfaca5afdab63543b65d.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】在学完有关中点的复习课后,陈老师带领同学们探究这样一道几何题:正方形
和正方形
共顶点A,连接
,取
的中点M,连接
.试探究
的形状.
以下是智慧小组的探究过程.
【特例探究】如图1,点G在边
上.
是等腰直角三角形,并给出了如下证明思路:
从M是
的中点入手,延长
交
于点N,如图2.
,得到
,
.
由于
,
,故
________.
所以
是________.
再结合M是
的中点从而可得结论.
(1)横线处应填:________,________.
【类比探究】
(2)如图3,将正方形
绕点A旋转,其他条件不变,在旋转过程中,试探究
的形状是否发生变化,并就图3的情形说明理由.
(3)在(2)的条件下,已知
,
,当点A,G,M在同一条直线上时,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/050370ba202f5802cf19a371d3cb116d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a690101e5595786c62946c4b29b665f4.png)
以下是智慧小组的探究过程.
【特例探究】如图1,点G在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a690101e5595786c62946c4b29b665f4.png)
从M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02f72f2bc5969ac21b34b0bfe8ea23e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031676fa40a8a376eaa1a1c3a4c22c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350fb9c57b7802bd0e90baa3d4b60a5e.png)
由于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c1dfc78642403761629836868da743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478d8cdad9506e889570ca6618a49615.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b8358533955a34c35db8b8045b4135.png)
再结合M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
(1)横线处应填:________,________.
【类比探究】
(2)如图3,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a690101e5595786c62946c4b29b665f4.png)
(3)在(2)的条件下,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6cee83d36c4da913e0790e5070c46f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.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,正方形ABCD的边长为4cm,点E、F分别从点D和点C出发,沿着射线DA、射线CD运动,且DE=CF,直线AF、直线BE交于H点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/20/14954676-8212-47a4-9b40-b8b2ae4f7028.png?resizew=165)
(1)当点E从点D向点A运动的过程中:
①求证:AF⊥BE;
②在图中画出点H运动路径并求出点H运动的路径长;
(2)在整个运动过程中:
①线段DH长度的最小值为______.
②线段DH长度的最大值为_________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/20/14954676-8212-47a4-9b40-b8b2ae4f7028.png?resizew=165)
(1)当点E从点D向点A运动的过程中:
①求证:AF⊥BE;
②在图中画出点H运动路径并求出点H运动的路径长;
(2)在整个运动过程中:
①线段DH长度的最小值为______.
②线段DH长度的最大值为_________ .
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】【教材呈现】华师版九年级上册数学教材第
页的部分内容:
如图
,在
中,点
、
分别是
,
的中点,可以猜想:
且
.
![](https://img.xkw.com/dksih/QBM/2023/1/11/3150656740384768/3151451148861440/STEM/9dee7aec786b498db9f4c7aeae5bc59c.png?resizew=446)
请根据教材内容,结合图
,写出证明过程.
【结论应用】
如图
,在
中
垂直于
的平分线
于点
,且交
边于点
,点
为
的中点.若
,
,求
的长.
【拓展延伸】
如图
,在
中,
,
,
,
为
中点,将
绕点
逆时针旋转一定的角度
,得到线段
,连结
,取
的中点
,连结
.则
面积的最大值为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4500d4031cbf22a456fa09fa393ba2b.png)
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/8455657dde27aabe6adb7b188e031c11.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950e82a0f9712457f2dd9f8a93f8a217.png)
![](https://img.xkw.com/dksih/QBM/2023/1/11/3150656740384768/3151451148861440/STEM/9dee7aec786b498db9f4c7aeae5bc59c.png?resizew=446)
请根据教材内容,结合图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
【结论应用】
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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fc998d33cdf37c272f79cfd64b7b99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
【拓展延伸】
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/813472fe85905302843cb3aadec9c8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】思考题:如图,正方形
中,点P为
上一个动点,点B关于
的对称点为点M,
的延长线交
的延长线于点Q,点E为
的中点,连接
,过点D作
交
的延长线于点F,连接
,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/c4858b47-5130-420d-be27-ef4e2054b34d.png?resizew=124)
在分析过程中,小明找不到解题思路,便和同学们一起讨论,以下是讨论过程:
请仔细阅读讨论过程,完成下述任务.
任务:
(1)小红的讨论中①的依据是______.
小亮的讨论中②的依据是______.
(2)请帮小明证明
;
(3)若
,连接
,直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eddb32e1d8bab4a0a43d7da9f73c1ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc760d60e65c158e9324c78d03dfe2e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/c4858b47-5130-420d-be27-ef4e2054b34d.png?resizew=124)
在分析过程中,小明找不到解题思路,便和同学们一起讨论,以下是讨论过程:
小红:可以得出![]() ![]() ![]() ![]() 又∵ ![]() ![]() ![]() ![]() 小亮: ![]() 理由:由小红的结论得 ![]() ![]() ![]() ∴ ![]() ∵ ![]() ![]() ![]() ∵ ![]() 小明:我好像知道该怎么解决问题了. |
任务:
(1)小红的讨论中①的依据是______.
小亮的讨论中②的依据是______.
(2)请帮小明证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc760d60e65c158e9324c78d03dfe2e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次