在
中,
,
,如图所示作正方形
,并连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/ed7e9238-9904-4f2c-bdeb-7aa3b22421df.png?resizew=470)
(1)操作发现:如图1,当点D在线段
上时,请你直接写出
与
的位置关系为 ;线段
的数量关系为 .
(2)猜想论证
当点D在直线
上运动时,如图2,是点D在线段
的延长线上时,是点D在线段
的延长线上时,
请你直接写出图2,图3中,线段
的数量关系:
①图2中线段
的数量关系为: ,
②图3中线段
的数量关系为:
(3)拓展延伸
当点D在直线
上运动时,若
,
①你直接写出三角形
的面积 ,
②直接写出线段
的长度 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d33432aba68024ae06ede52b6d56edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/ed7e9238-9904-4f2c-bdeb-7aa3b22421df.png?resizew=470)
(1)操作发现:如图1,当点D在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d6ba91f52d525157a16c77e858b1c.png)
(2)猜想论证
当点D在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
请你直接写出图2,图3中,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d6ba91f52d525157a16c77e858b1c.png)
①图2中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d6ba91f52d525157a16c77e858b1c.png)
②图3中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d6ba91f52d525157a16c77e858b1c.png)
(3)拓展延伸
当点D在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dad18db3c7fd726c1bbbe8f821be91.png)
①你直接写出三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
②直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
更新时间:2024-01-08 18:32:35
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在正方形ABCD中,对角线AC、BD相交于点O,E为OC上动点(不与O、C重合),作AF⊥BE,垂足为G,分别交BC、OB于F、H,连接OG、CG.
(1)求证:AH=BE;
(2)∠AGO的度数是否为定值?说明理由;
(3)若∠OGC=90°,BG=
,求△OGC的面积.
(1)求证:AH=BE;
(2)∠AGO的度数是否为定值?说明理由;
(3)若∠OGC=90°,BG=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://img.xkw.com/dksih/QBM/2018/11/15/2076115268108288/2076912544071680/STEM/ef0174f0abd04a6db15158e84f629d9e.png?resizew=157)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在四边形
中,
交于点
,点
是
上一动点.
图1图2图3
(1)如图1,若四边形
为菱形,且
,在
的右侧作等边三角形
,直接写出
与
的数量关系:______.
(2)如图2,若四边形
为正方形,在
的右侧作等腰直角三角形
,且
,连接
与
之间有怎样的数量关系?请通过计算或证明进行说明.
(3)如图3,点
是边长为
的正方形
对角线
延长线上一点,在
的右侧作等腰直角三角形
,且
,连接
,若
,则
的面积为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/b49b06d7-6c36-4587-8591-b0957c0501e7.png?resizew=401)
图1图2图3
(1)如图1,若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec7e56107b5f2f34e420caffd1159b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)如图2,若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec7e56107b5f2f34e420caffd1159b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b78356dbceb326e1b1561e0a15d8ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b440630ad65e533a4b79f9a854753b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
(3)如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb8697622fb9d281cf44feb4adaf14a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3599885b5d5ab4c2e2ce9614701b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5beb1af9d2ffb7d0089dec2c1af554da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3cd61d00f89e68ccca2cac5c937783.png)
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】正方形
的边长为1,连接
,过点C作
的平行线
,
与
相交于点F,过点D作
.
(1)求
的面积;
(2)当
时,求
的长;
(3)若
的面积记为
,△DFH的面积记为
,
的面积记为
,
的面积记为
,
,请用
的代数式表示
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56c16f354ebcdfddfa9e4e2195ac004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/2/f337af99-703f-474a-81a4-f83ac182ba57.png?resizew=186)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14252009a6dd4ced2746d25089bafb2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5a0a6e5b3f489a7032ea5116c96024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25265fcbb10d34c23d98dc3c81525c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff00441c41fc516c37876d266fcbc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f30f56664446f32dbbc2c5f12a99374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc565319eaf74623f3fd61ce5ab2b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e582685d80fe91def7b770ddeb5fd30.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】如图,在平面直角坐标系中,直线
与x轴,y轴分别交于点
,经过点C的直线与x轴交于点
.
的解析式;
(2)点G是线段
上一动点,连接
,若
把
分成两个三角形,且满足
,求点G的坐标;
(3)已知D为
的中点,点E是平面内一点,当
是以
为直角边的等腰直角三角形时,直接写出点E的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e488bcf5c0eacfb5cb27a70038d4f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a3e7d1f1890863b7483a98b618119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b00c7d98aa59fe7e9b6001181ba542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)点G是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddc4dd9e86d2dc601b3e5b1e8cf942f.png)
(3)已知D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】已知:如图,在四边形
和
中,
,
,点
在
上,
,
,
,延长
交
于点
.点
从点
出发,沿
方向匀速运动,速度为
;同时,点
从点
出发,沿
方向匀速运动,速度为
.过点
作
于点
,交
于点
.设运动时间为
.
解答下列问题:
(1)①判断:直线
与
的位置关系是 ;
②当点
在线段
的垂直平分线上时,求
的值;
(2)连接
,作
于点N,当四边形
为矩形时,求t的值;
(3)点
在运动过程中,是否存在某一时刻
,使点
在
的平分线上?若存在,求出
的值;若不存在,请说明理由;
(4)连接
,
,设四边形
的面积为
,直接写出运动过程中
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9189b25951339f71d150d33f1c6ea530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbb53077d8d62f44415f4d56c6b5c081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa65fc855ee3dc1c62a525e1aa671b54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793eb547b9eacf5106c80fed095017ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01a7a8fdfb1fbde557f1423a8c8b9bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51b844127904bfd3abce1d35a0acac1.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/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fdc31e6195dccc59a340cf78ec98dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf193ff4546dfb09008d6354f374b280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e780a16aa309b7e69c656cea294d72.png)
解答下列问题:
(1)①判断:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53805f2f4e8b4c964ed8d4639420f1dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ffc3e33718d90d9bdeb05ddeb53299.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a2e6494cf8d2dff0746a9bb72cef43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350e954f629c1901a5cec03558319e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bdbbd3084ddc946e12d530d2192522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff2736998f1ae2c0ad52c5aa47e58c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5b294fc00b77f36284e80014998185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐2】平移,翻折和旋转是几种重要的几何变换方法,它们可以通过改变图形的位置,使分散的条件集中,从而便于问题解决.
(1)知识理解:如图1,
中,
,
,将
向右平移,使B与C重合,得
,连接
,则四边形
是 形;
(2)问题探究:如图2,E是正方形
的边
的中点,F是
延长线上的点,
,若
,直接写出正方形的边长;(不用书写解答过程,但需在图中作出必要的辅助线)
(3)拓展应用:
中,
,
,
,延长
至E,使
,作
,
与
交于G,当
时,求
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/04837d03-7d4c-4ae0-8daa-5303ea4a758e.png?resizew=362)
(1)知识理解:如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e5a933a2a0ff3a28009cc989293ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08c14e87a2bcf7090eab2fea73667d2.png)
(2)问题探究:如图2,E是正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ade06068471a9d76e32b417bef7551.png)
(3)拓展应用:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ca082df4cfac078e6b0e254000a5660.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a02c4cd9a5c10069d728743d9a227f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4267c178771ea6ddccecd9f9128d3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/decaaa999bfb7d74d1d69a3dd2be0a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf733ac3b5bc538868b9e499021508c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba39348907da2265be5a38c3079a9dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93401a1551b7e3c5bda0c9bb7220e01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】已知:如图1,△ABC中,AB=13,BC=14,AC=15.将线段AB沿过点A的直线翻折,使得点B的对应点E恰好落在BC边上,折痕与BC边相交于点D,如图2所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/ed6a7b09-b412-4f94-820e-d4b4d147aec3.png?resizew=314)
(1) 求线段DE的长;
(2) 在图2中,若点P为线段AC上一点,且△AEP为等腰三角形,求AP的长.
小李在解决第(2)小题时的过程如下:
① 当EA=EP时,显然不存在;当AE=AP时,则AP=__________;(需填空)
② 对于“当PA=PE时的情形”,小李在解决时遇到了困难.小明老师对小李说:对于这个“直线形”图形直接解决困难时,我们可以建立平面直角坐标系,用一次函数的知识解决.如以点D为坐标原点,BC所在直线为x轴,然后求出AE中垂线的直线解析式,然后求出点P的坐标,最后用勾股定理求出AP的长……
请根据小明老师的提示完成第(2)题中②的求解,你也可以用自己的方法求出AP的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/ed6a7b09-b412-4f94-820e-d4b4d147aec3.png?resizew=314)
(1) 求线段DE的长;
(2) 在图2中,若点P为线段AC上一点,且△AEP为等腰三角形,求AP的长.
小李在解决第(2)小题时的过程如下:
① 当EA=EP时,显然不存在;当AE=AP时,则AP=__________;(需填空)
② 对于“当PA=PE时的情形”,小李在解决时遇到了困难.小明老师对小李说:对于这个“直线形”图形直接解决困难时,我们可以建立平面直角坐标系,用一次函数的知识解决.如以点D为坐标原点,BC所在直线为x轴,然后求出AE中垂线的直线解析式,然后求出点P的坐标,最后用勾股定理求出AP的长……
请根据小明老师的提示完成第(2)题中②的求解,你也可以用自己的方法求出AP的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/f2ad1f45-33ec-4b12-bbbc-95ce43d3d1de.png?resizew=158)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图1,已知正方形
的边长为
,点
在
边上,
,连接
,点
、
分别为
、
边上的点,且
.
到
的距离;
(2)如图2,连接
,当
、
、
三点共线时,求
的面积;
(3)如图3,过点
作
于点
,过点
作
于点
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.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/783a833992e0862211a15fec2d3e3dda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bced1780d1fd068d0242fa11c18ed5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7afc55b4911a1fa183fb4612c6462d95.png)
(3)如图3,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b781b571ce46d905611746d528fbe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7f84b1d5197028b34c1e7825d18dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】如图1,在矩形ABCD中,点E是边CD的中点,点F在边AD上,EF⊥BD,垂足为G.
(1)如图2,当矩形ABCD为正方形时,求
的值;
(2)如果
=
,AF=x,AB=y,求y与x的函数关系式,并写出函数定义域;
(3)如果AB=4cm,以点A为圆心,3cm长为半径的⊙A与以点B为圆心的⊙B外切.以点F为圆心的⊙F与⊙A、⊙B都内切.求
的值.
(1)如图2,当矩形ABCD为正方形时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598bbb54eacbb067e5646982bad731f.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598bbb54eacbb067e5646982bad731f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
(3)如果AB=4cm,以点A为圆心,3cm长为半径的⊙A与以点B为圆心的⊙B外切.以点F为圆心的⊙F与⊙A、⊙B都内切.求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598bbb54eacbb067e5646982bad731f.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712444955746304/2714658149875712/STEM/c4754f158a6b402ea82ed248be9beff0.png?resizew=503)
您最近一年使用:0次