已知:如图1,平面直角坐标系中,点
的坐标是
,点
在
轴上,且
,点
是线段
上的一点,以
为边向下作等边
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/daed1fd4-4031-4c01-8691-2042b6376d6c.png?resizew=375)
(1)如图2,当
时,连接
,求证:
平分
;
(2)如图3,当点
落在
轴上时,求出点
的坐标;
(3)点
从点
向点
滑动的过程中,点
也会随之滑动,利用图1探究点
的运动轨迹,请在图1画出点
的运动轨迹,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd50a2402f3ec12c84551427b0d6cf10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d572eb3233343b90f190dde56701f22b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/daed1fd4-4031-4c01-8691-2042b6376d6c.png?resizew=375)
(1)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce05f91ce17863abc8a5a8f6002b75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
(2)如图3,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
更新时间:2024-01-09 12:31:10
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】在平面直角坐标系
中,点A坐标为
,点B的坐标为
.连接
.
轴,请直接写出线段
的长度为______;
(2)点
是x轴上的点,连接
,三角形
的面积为6.
①若
时,求b的值;
②过点B作
轴交
于D,交x轴于点N,设点D的纵坐标为d,且
,
,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce43981e5251e382690797f24907de2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e27494a9f228b066e78ff9e0ef38df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc195a9f7ac138e5a1ad87d5fa201c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54860df63927baaf92ae58d000759d8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ed1fce01430ae31294c29d626626f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e8087430889abfe1a096d6af0f01a.png)
②过点B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0169a1676b6c56b32ebe467e41a4ee84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4b9c284d95d4e170c8da904166a7c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5319504bde1a5a36d6f2277b36deef6.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】在平面直角坐标系
中,点
,
,
不在同一直线上,对于点
和线段
给出如下定义:过点
向线段
所在直线作垂线,若垂足
在线段
上,则称点
为线段
的内垂点,当垂足
满足
最小时,称点
为线段
的最佳内垂点.已知点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/eb9b6563-9556-4037-80cf-9e5d707ce05f.png?resizew=259)
(1)在点
中,线段
的内垂点为______;
(2)若点
是线段
的最佳内垂点,则点
的坐标可以是______(写出两个满足条件的点
即可);
(3)已知点
,若线段
上的每一个点都是线段
的内垂点,直接写出
的取值范围;
(4)已知点
,
,若线段
上存在线段
的最佳内垂点,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a373262415090719ca97d2c3d4d8fe12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a78c0a3ebb2cf4bd1a1b77667eeb8b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/eb9b6563-9556-4037-80cf-9e5d707ce05f.png?resizew=259)
(1)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04cd314cd861616c4320ef3e34d3cf05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fcb20a6972108871adbf284f9e5006.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fcb20a6972108871adbf284f9e5006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5e4376481f5454624db498fc3ae5e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fcb20a6972108871adbf284f9e5006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(4)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df96c127183a7830eb5af7712074057c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e965225cdc3a669a70bfbda1894ad307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fcb20a6972108871adbf284f9e5006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图1,在正方形ABCD中,O是对角线AC上一点,点E在BC的延长线上,且OE = OB.
(1)求证:△OBC ≌ △ODC.
(2)求证:∠DOE = ∠ABC.
(3)把正方形ABCD改为菱形,其他条件不变(如图2),若∠ABC =52°,求∠DOE的度数.
(1)求证:△OBC ≌ △ODC.
(2)求证:∠DOE = ∠ABC.
(3)把正方形ABCD改为菱形,其他条件不变(如图2),若∠ABC =52°,求∠DOE的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/7593663b-9d08-4374-8f9a-6b57fe4f2edc.png?resizew=339)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图所示,点A、C在等腰直角三角形HBE的直角边BH和BE上,且AB=BC,CF⊥HE.EF⊥AE于E.试探究线段AE、EF的数量关系,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2012/1/3/1573320668528640/null/STEM/1c37a77e99b14e9ca318afbcc2f3a2bd.png?resizew=125)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/bad00bd6-f3ca-412d-9376-8fe3e986151e.png?resizew=383)
(1)求
的长;
(2)点D在
的延长线上,点M在
的平分线上,连接
,且
.
①求证:
是等边三角形;
②
的值是否为定值,如果是,请求出定值;如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95dbd0d52691e6ce5b9d9e61d1693c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/bad00bd6-f3ca-412d-9376-8fe3e986151e.png?resizew=383)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)点D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a60b79fb0d16380d50d2bb040e7a709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f38105b701adcd96b87f27225ca14e95.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62881e1a056e155f967050a16e49d833.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在平面直角坐标系中,抛物线
与x轴交于点
和点
,与y轴交于点
.
(2)若点P为第三象限内抛物线上一动点,作
轴于点D,交
于点E,点G为y轴上一动点,过点E作
,设点P的横坐标为m.求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5bca93f672c0492da6d136e0c54b3e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b6ff686e6aab6f538e26dc6a110e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11dc695c9548c1baea5d7e75fe9f5d4e.png)
(2)若点P为第三象限内抛物线上一动点,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f00d0ff8dd38da17167cf9b789eec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57cd3f434f0cb913441e13b2c648b4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50f39e8be37ae1e2c2b38c7e2f48193.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】【方法回顾】
课本研究三角形中位线性质的方法
已知:如图①, 已知
中,
,
分别是
,
两边中点.
求证:
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950e82a0f9712457f2dd9f8a93f8a217.png)
证明:延长
至点
,使
, 连按
.可证:
( )
由此得到四边形
为平行四边形, 进而得到求证结论
(1)请根据以上证明过程,解答下列两个问题:
①在图①中作出证明中所描述的辅助线(请用
铅笔作辅助线);
②在证明的括号中填写理由(请在
,
,
,
中选择) .
【问题拓展】
(2)如图②,在等边
中, 点
是射线
上一动点(点
在点
的右侧),把线段
绕点
逆时针旋转
得到线段
,点
是线段
的中点,连接
、
.
①请你判断线段
与
的数量关系,并给出证明;
②若
,求线段
长度的最小值.
课本研究三角形中位线性质的方法
已知:如图①, 已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a078495ba47076ccaa28b46f765d80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950e82a0f9712457f2dd9f8a93f8a217.png)
证明:延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe6d389a6c448d92b79d89bc9e8489f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c2c025619a4584210c89166a8165a09.png)
由此得到四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10af0a2e32fb3f3af9664617ac05b669.png)
(1)请根据以上证明过程,解答下列两个问题:
①在图①中作出证明中所描述的辅助线(请用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772562a411cb35b12e8a5878ddaa9de1.png)
②在证明的括号中填写理由(请在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec76570a0ddc83c103a4b77589d80701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2ba04decd9d9204ec64d567af55721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9970629e91021aa64fb871c83746418c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cbfd199e0ba3e1ec7016a44454e7a3c.png)
【问题拓展】
(2)如图②,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
①请你判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/2020/7/4/2498857080168448/2500066653528064/STEM/b5c8695d4b9e4cabb2d4f9887df362c6.png?resizew=440)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
和
都是等边三角形,点A、D、E在一直线上,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/30/ba460d6c-014d-4bc3-897f-2ef3e6fbb258.png?resizew=208)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b265d121f9ebc13671a5719604476a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/30/ba460d6c-014d-4bc3-897f-2ef3e6fbb258.png?resizew=208)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4db192a176978a1240d931677724694.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d3ceb08a9b251ed989089bf50011d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15795066b53973d9562c601462f4b2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图所示,请在由32个边长都为1的小正三角形组成的网格中,按下列要求作一个直角三角形,且直角三角形的三个顶点都在网格顶点上.
(1)在图①中画出斜边为2的直角三角形;
(2)在图②中画出斜边为
的直角三角形;
(3)在图③中画出斜边为
的直角三角形
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/5/5f29a041-3ead-4fa3-b571-2b5e20a91f60.png?resizew=405)
(1)在图①中画出斜边为2的直角三角形;
(2)在图②中画出斜边为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(3)在图③中画出斜边为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50690dab38f4512eb72e18b7f86cf6f6.png)
您最近一年使用:0次