在平面直角坐标系
中,点
,点B在x轴正半轴上,点C在第一象限内.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/6c61d7b5-4565-4df6-955c-183e68e1106a.png?resizew=544)
(1)如图1,
.
①若
是以AC为斜边的直角三角形,且
.请在图(1)中利用圆规、无刻度直尺作出点C的位置(不写作法,保留作图痕迹),写出点C的坐标________;
②若
是等边三角形.求点C的坐标;
(2)如图2,
是等边三角形,点C在以
为圆心,半径为r的圆上.若存在两个
满足条件,求r的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32366143230ca122894a4bada7c7b96d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/6c61d7b5-4565-4df6-955c-183e68e1106a.png?resizew=544)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9466d03bc916a9169eaf39863d59fceb.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3626f34068e021b882e9fc8354f3be9a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92a2ebeacda6ec35a4f5304ba38a704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2023-04-02 20:13:44
|
相似题推荐
解答题-问答题
|
困难
(0.15)
名校
【推荐1】定义:P、Q分别是两条线段a和b上任意一点,线段PQ长度的最小值叫做线段a与线段b的“冰雪距离”,已知O(0,0),A(1,
),B(m,n),C(m,n+2)是平面直角坐标系中四点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/adf983d2-9361-4edd-a38b-6f23a35c4d2d.png?resizew=620)
(1)根据上述定义,完成下面的问题:
①当m=2
,n
时,如图1,线段BC与线段OA的“冰雪距离”是 ;
②当m=2
时,线段BC与线段OA的“冰雪距离”是
,则n的取值范围是 ;
(2)如图2,若点B落在圆心为A,半径为
的圆上,当n
时,线段BC与线段OA的“冰雪距离”记为d,结合图象,求d的最小值;
(3)当m的值变化时,动线段BC与线段OA的“冰雪距离”始终为
,线段BC的中点为M.直接写出点M随线段BC运动所走过的路径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/adf983d2-9361-4edd-a38b-6f23a35c4d2d.png?resizew=620)
(1)根据上述定义,完成下面的问题:
①当m=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae65bdb69940a67a18d56ff02060b22.png)
②当m=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(2)如图2,若点B落在圆心为A,半径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187630271a8f95bd27ed18ba44733573.png)
(3)当m的值变化时,动线段BC与线段OA的“冰雪距离”始终为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图,在平面直角坐标系中,点
为坐标原点,
的直角顶点
在
轴的正半轴上,A点坐标为
,点
在射线
上,点
以每秒
个单位长度的速度从点
出发向终点
运动,同时动点
以每秒
个单位长度的速度从点
出发向终点
运动,点
,
同时到达终点,点
为
的中点,连接
,
,以
,
为边构造▱
设点
的运动时间为
秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/5e16a45f-26ac-4320-b550-05b227d4c092.png?resizew=219)
(1)
______ ,点
的坐标是______ (用含
的代数式表示);
(2)在点
,
运动过程中,是否存在直线
将▱
的面积分成
:
的两部分?若存在,则求出此时
的值;若不存在,请说明理由.
(3)若
,
交于点
,作点
关于直线
的对称点为点
,连接
,
,当
是以
为腰的等腰三角形时,
的值是______ (直接写出答案).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa3ed73c69ee962f2cbd1b9f62f38b3.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/12b8ee323167ad42262174be8185d073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e965f964cfa0901da9174a2f1b4b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/5e16a45f-26ac-4320-b550-05b227d4c092.png?resizew=219)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)在点
![](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/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae02bd1c82ca4f986a5a91fe47c71bb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b25f3ea33cc08b1e2a0d9c3a9dccaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09677b9c33f26f5be999e74f0f34b1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b21d2fee4462af68e147962232fd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.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
|
困难
(0.15)
【推荐1】如图,边长为8的等边三角形
中,D,E分别是
边的中点,点P从B点沿着折线
运动,连接
绕点A逆时针旋转60°到点Q.
(1)如图1,当点P在
上运动时,求
的度数;
(2)如图2,连接
,设P点的运动速度为每秒1个单位长度,运动时间为t,请求出
的面积S关于t的函数关系式;并指出t的取值范围;
(3)当
是直角三角形时,直接写出此时
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893bd35964001f6481611f8929bcf8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937ce16f676e06ed7612a1061da93701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a127d42dfb12478798365dadcc092a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/4c2da14e-f675-4976-874d-7bf89c2323e4.png?resizew=670)
(1)如图1,当点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e875682c8dfcd4981243a41579703c6.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45330d7fcd8829b408ec2ee57b641f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7ad020b11f04f6b9b6f5ce766ad11c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5547ed68c4897c2a5e4403ff17dde6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
真题
【推荐2】已知
是等边三角形,点
是射线
上的一个动点,延长
至点
,使
,连接
交射线
于点
.
(1)如图1,当点
在线段
上时,猜测线段
与
的数量关系并说明理由;
(2)如图2,当点
在线段
的延长线上时,
①线段
与
的数量关系是否仍然成立?请说明理由;
②如图3,连接
.设
,若
,求四边形
的面积.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a3a922f7ea64083c415c72259179a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/24/8327bf8c-fc5a-4c14-887b-d93a11c9c0f4.png?resizew=541)
(1)如图1,当点
![](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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee1ee0e54adcc43004ae6c6946ef056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10af0a2e32fb3f3af9664617ac05b669.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】如图
,抛物线
与
轴交于
,
两点,与
轴交于点
,点
是第一象限内抛物线上的一个动点,过点
作
轴,垂足为
,
交直线
于点
,设点
的横坐标为
.
![](https://img.xkw.com/dksih/QBM/2023/4/13/3215640743895040/3216158612815872/STEM/a528c16f87474b4793408b99447b1c62.png?resizew=550)
(1)求抛物线的表达式;
(2)设线段
的长度为
,请用含有
的代数式表示
;
(3)如图
,过点
作
,垂足为
,当
时,请求出
的值;
(4)如图
,连接
,当四边形
是矩形时,在抛物线的对称轴上存在点
,使原点
关于直线
的对称点
恰好落在该矩形对角线所在的直线上,请直接写出满足条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940c8f82a5ed7e7ed775e85f9e7bc478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbdef5d0c05acbf63fa72fa85c5bb45.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f00d0ff8dd38da17167cf9b789eec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/2023/4/13/3215640743895040/3216158612815872/STEM/a528c16f87474b4793408b99447b1c62.png?resizew=550)
(1)求抛物线的表达式;
(2)设线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e48ec323eb922d8f95970689e411021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab618c936da03808cb9953783d42b30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(4)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033274547930b2e2dcd4ea4919a36738.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/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图,在△ABC中,∠C=90°,AC=6,BC=8.动点P从点A出发沿折线AC﹣CB以每秒5个单位长度的速度向终点B运动,当点P不与△ABC的顶点重合时,过点P作PD⊥AB于点D,以PD为直角边构造等腰直角三角形PDE,使∠DPE=90°,且点E、点C始终在PD的同侧,设点P运动的时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/0351531d-111e-40db-a09a-9f087d4ea1d4.png?resizew=130)
(1)用含t的代数式表示线段PC的长.
(2)当点E落在BC边上时,求t的值.
(3)当点E在AB边垂直平分线上时,求t的值.
(4)连结CE,当∠PEC为锐角时,直接写出t的取值范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/0351531d-111e-40db-a09a-9f087d4ea1d4.png?resizew=130)
(1)用含t的代数式表示线段PC的长.
(2)当点E落在BC边上时,求t的值.
(3)当点E在AB边垂直平分线上时,求t的值.
(4)连结CE,当∠PEC为锐角时,直接写出t的取值范围.
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐1】如图,已知AB是⊙O的直径,C是⊙O上一点(不与A、B重合),D为的
中点,过点D作弦DE⊥AB于F,P是BA延长线上一点,且∠PEA=∠B.
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492385492426752/2493663249448960/STEM/0a53d84968474c30a910cab0620dcbe1.png?resizew=205)
(1)求证:PE是⊙O的切线;
(2)连接CA与DE相交于点G,CA的延长线交PE于H,求证:HE=HG;
(3)若tan∠P=
,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492385492426752/2493663249448960/STEM/0a53d84968474c30a910cab0620dcbe1.png?resizew=205)
(1)求证:PE是⊙O的切线;
(2)连接CA与DE相交于点G,CA的延长线交PE于H,求证:HE=HG;
(3)若tan∠P=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16d09692f7b0fb5633964437202d21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1d3f5dd2db1e4aa516787a82ddc45.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】如图, 已知在 Rt
中,
, 点
为射线
上一动点, 且
, 点
关于直线
的对称点为点
, 射线
与射线
交于点
.
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893833143951360/2898496695533568/STEM/c6d5b7cf-26a3-4c56-8492-ae21b7234b05.png?resizew=230)
(1)当点
在边
上时,
① 求证:
;
②延长
与边
的延长线相交于点
, 如果
与
相似,求线段
的长;
(2)联结
, 如果
, 求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377e2bf9272651444c497f36312acaba.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/9ebe5e7c056f39e96b487f99a372bf76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/2022/1/13/2893833143951360/2898496695533568/STEM/c6d5b7cf-26a3-4c56-8492-ae21b7234b05.png?resizew=230)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
① 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62505b6d192234fc01724b35d8e2cf33.png)
②延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb936e02a02c16c586d4463b5ca05191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a9ec45721f7b4d1c99917ac0d970f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)联结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c036436ad0aaeea6aebb13ceb03d6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468cb8dae99d9ac0cc695e9b21c5386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c6784571d818982d8d3fe53410bc4b.png)
您最近一年使用:0次