如图,在菱形ABCD中,E、F、G分别为边AB、AD、BC的中点,连接EF、FG、EG
![](https://img.xkw.com/dksih/QBM/2022/4/3/2950101773975552/2951578736082944/STEM/5ee29904-becd-429d-942d-cc4dea52f594.png?resizew=191)
(1)求证:
为直角三角形
(2)连接ED,当
,
时,求ED的长.
![](https://img.xkw.com/dksih/QBM/2022/4/3/2950101773975552/2951578736082944/STEM/5ee29904-becd-429d-942d-cc4dea52f594.png?resizew=191)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b103d3b19a5104e69ab3f6ab4e8d53f.png)
(2)连接ED,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d86432e1f8b33f9200fd98e874fa5a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a008d7b4ae0a6525b978cbf99861e010.png)
2022·北京·模拟预测 查看更多[3]
北京市理工大学附属中学2021-2022学年九年级下学期限时练习数学试题(已下线)专题14 解直角三角形——5年(2018~2022)中考1年模拟数学分项汇编(北京专用)(已下线)专题03-4解直角三角形提高卷
更新时间:2022-04-05 13:05:13
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】在平面直角坐标系中,点O为坐标原点,点
,点B在x轴正半轴上,连接
,点E是
的中点,点F是
的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/55549db6-9cb3-4a3e-978d-28a42ebd431a.png?resizew=456)
(1)如图,求点B的坐标;
(2)如图,点G在y轴正半轴上,连接
,过点F作
的垂线交x轴于D,设点G的纵坐标为t,线段
的长为d,求用含t的式子表示d;
(3)如图,在(2)的条件下,点H在
的延长线上,连接
和
交于点K,以
和
为邻边作平行四边形
,若
平分
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c87b7e39ab4c173e357d92f345ddab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8770f4edd2a52f660ab2bd2540feb8aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/55549db6-9cb3-4a3e-978d-28a42ebd431a.png?resizew=456)
(1)如图,求点B的坐标;
(2)如图,点G在y轴正半轴上,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
(3)如图,在(2)的条件下,点H在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2ac42e2eb33e41dcda4d732890f841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46f6cae0ee47b10f46eb3358d2ff4bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03b9532ce6f79d3f08b9f72b0b2c457.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在平面直角坐标系中,点
,
,
),C,D分别为
,
的中点.以点O为中心,逆时针旋转
得
点C,D的对应点分别为点
,
.
落在y轴上时,点
的坐标为_____,点
的坐标为______;
(2)如图②,当点
落在
上时, 求点
的坐标和
的长;
(3)若M为
的中点,求
的最大值和最小值(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685d31faa9b3bc099e4c5a11b80088f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d1e4a02f6a99a4b838dcaf9541d7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7272800367fac5ade01f94e7a5c3ef5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8d4c698f29985f639e496c12155f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb14ac7dc9cd7c8b11276bbf5c5f687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(2)如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
(3)若M为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d42170c7d4249f6b390823606c18c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
您最近一年使用:0次
【推荐3】如图1,在△ABC中,∠C=90°,∠ABC=30°,AC=1,D为△ABC内部的一动点(不在边上),连接BD,将线段BD绕点D逆时针旋转60°,使点B到达点F的位置;将线段AB绕点B顺时针旋转60°,使点A到达点E的位置,连接AD,CD,AE,AF,BF,EF.
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760252145131520/2760635534163968/STEM/824fbd86-dda8-41d6-80c6-eb2cb40a3f49.png)
(1)求证:△BDA≌△BFE;
(2)①CD+DF+FE的最小值为 ;
②当CD+DF+FE取得最小值时,求证:AD∥BF.
(3)如图2,M,N,P分别是DF,AF,AE的中点,连接MP,NP,在点D运动的过程中,请判断∠MPN的大小是否为定值.若是,求出其度数;若不是,请说明理由.
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760252145131520/2760635534163968/STEM/824fbd86-dda8-41d6-80c6-eb2cb40a3f49.png)
(1)求证:△BDA≌△BFE;
(2)①CD+DF+FE的最小值为 ;
②当CD+DF+FE取得最小值时,求证:AD∥BF.
(3)如图2,M,N,P分别是DF,AF,AE的中点,连接MP,NP,在点D运动的过程中,请判断∠MPN的大小是否为定值.若是,求出其度数;若不是,请说明理由.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在
中,
平分
,
于点
,点
是
的中点.
(1)如图1,
的延长线与
边相交于点
,求证:
;
(2)如图2,线段
、
、
之间满足的数量关系为_________;
【初步运用】
(3)如图3,
中,
平分
,
,垂足为
,过
作
交
于点
,
,
,则
_________;
【灵活运用】
(4)如图4,
中,
,
,点
在
上,
,
,垂足为E,
与
交于点
,线段
、
之间满足的数量关系为_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09785a454d62cbbd2e16ed61ed172a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af07faebaf5346f6c3cd2603519d0f60.png)
(2)如图2,线段
![](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/49b50357a6545cae8348e3059312f520.png)
【初步运用】
(3)如图3,
![](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/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.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/6c0aa4c793921fdaa5d430cb90d78ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f01c4faacedfe56f5127d6c0cc63cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
【灵活运用】
(4)如图4,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.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/dbaec9cc53032210714b95af502c7dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878a63a7899c8226744748a0102eab95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】正方形ABCD中,点E,G,H分别在AB,AD,BC上,DE与BG相交于点O.∠GOD=90°,
(1)求证:DE=GH;
(2)平移图1中的线段GH,使G点与D点重合,H点在BC的延长线上,连接EH,取EH的中点P,连接PC,且
,求证:BE=
PC.
![](https://img.xkw.com/dksih/QBM/2021/5/15/2721606071246848/2789486344683520/STEM/898ce877-c200-4ebf-8110-76371aa73461.png?resizew=211)
(1)求证:DE=GH;
(2)平移图1中的线段GH,使G点与D点重合,H点在BC的延长线上,连接EH,取EH的中点P,连接PC,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275d68d50a992cb17d948d3299012a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2021/5/15/2721606071246848/2789486344683520/STEM/898ce877-c200-4ebf-8110-76371aa73461.png?resizew=211)
![](https://img.xkw.com/dksih/QBM/2021/5/15/2721606071246848/2789486344683520/STEM/2cc5e4cf-360d-4037-b144-67d4c680bc63.png?resizew=234)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】定义一种变换:平移抛物线
得到抛物线
,使
经过
的顶点
.设
的对称轴分别交
于点
,点
是点
关于直线
的对称点.
![](https://img.xkw.com/dksih/QBM/2016/4/19/1574194110226432/1574194115944448/STEM/f56a5864419649359632a6f51dd8fd1c.png)
(1)如图1,若
:
,经过变换后,得到
:
,点
的坐标为
,则①
的值等于______________;
②四边形
为( )
(2)如图2,若
:
,经过变换后,点
的坐标为
,求
的面积;
(3)如图3,若
:
,经过变换后,
,点
是直线
上的动点,求点
到点
的距离和到直线
的距离之和的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504b6ba4e1aa49d4ffac24851cb2e31e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f91a16412f60a545a5643bc13090f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2016/4/19/1574194110226432/1574194115944448/STEM/f56a5864419649359632a6f51dd8fd1c.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0a69144e8a38f3ed31018d5a21b026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b085858362045208caf3dd60121256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
②四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.平行四边形 | B.矩形 | C.菱形 | D.正方形 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3666050060fb25232784bb8ed3545ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0044a398fd82460f6825c223c77eab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549be91a5df0e35bd1b893f1c1a0c919.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4441b4a277984abf44b51c087d0d3d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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1,抛物线y=ax2+bx+4的图象过A(﹣1,0),B(4,0)两点,与y轴交于点C,作直线BC,动点P从点C出发,以每秒
个单位长度的速度沿CB向点B运动,运动时间为t秒,当点P与点B重合时停止运动.
(1)求抛物线的表达式;
(2)如图2,当t=1时,求
的面积;
(3)如图3,过点P向x轴作垂线分别交x轴,抛物线于E、F两点.
①求PF的长度关于t的函数表达式,并求出PF的长度的最大值;
②连接CF,将
沿CF折叠得到
,当t为何值时,四边形
是菱形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)求抛物线的表达式;
(2)如图2,当t=1时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7e225f9f18b87f430c21cc8d679850.png)
(3)如图3,过点P向x轴作垂线分别交x轴,抛物线于E、F两点.
①求PF的长度关于t的函数表达式,并求出PF的长度的最大值;
②连接CF,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0936e532862712045365cb3f63fced9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90347dec87ddb38650a41de85b52778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ecbe5dd1a5fb7ab6015e27367f73c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/bcaf53ab-6be4-4ab1-a6ed-15abbb46ba8b.png?resizew=546)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】如图,在△
中,高
=3,∠
=45°,
=
,动点
从点
出发,沿
方向以每秒1个单位长度的速速向终点
运动,当点
与点
、
不重合时,过点
作
、
的平行线,与
分别交于点
、
,将△
绕
的中点旋转180°得△
,设点
的运动时间为
秒,△
与△
重叠部分面积为
.
![](https://img.xkw.com/dksih/QBM/2020/5/20/2466740897128448/2467500690456576/STEM/e88184fb79764d4eabf5a3b339ed2215.png?resizew=286)
(1)当
= 秒时,点
落在
边上.
(2)求
与
的函数关系式.
(3)当直线
将△
分为面积比为1:3的两部分时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17eb69e36e3029d4303e03c28c29d5ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/a0ed1ec316bc54c37c4286c208f55667.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f72399cfc11b5c850f77ce2f6f560a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f72399cfc11b5c850f77ce2f6f560a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/2020/5/20/2466740897128448/2467500690456576/STEM/e88184fb79764d4eabf5a3b339ed2215.png?resizew=286)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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,将两块直角三角板摆放在平面直角坐标系中,有
,
,
,且
.现将
绕点
逆时针旋转,旋转角为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
.在旋转过程中,直线
分别与直线
,
交于点
,
.
(1)当旋转角
时,求点
的坐标;
(2)在旋转过程中,当
时,求直线
的解析式;
(3)在旋转过程中,
能否为等腰是三角形?若能,请求出所有满足条件的
值;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23cd4623dca98b6b13eec17385408248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c9450b913de32261a2706d9031342b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dbf6430a5fa1b488d4a4d56a520fb8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf33aa3d1fbed7a3ba2983f1ed27451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4da6b8ab17f2e7e612e346bcbc7dc33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/28/6a84a01d-ce32-4694-a058-fc3ca7c44459.png?resizew=181)
(1)当旋转角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b2ed34734a50e8b2b0e5eca6eccd66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)在旋转过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00e0ca93b81029af5c4cd3bbd0314ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)在旋转过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5225e75e359a1aaac75c19bba1c338d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
您最近一年使用:0次