如图,在
中,
,点
是
的中点,
,点
,
同时从点
出发,以相同的速度分别沿射线
、射线
运动,以
为边向
内部作正方形
.当点
到达
点时,点
,
同时停止运动,设
,正方形
与
重叠部分的面积为
.当点
运动至
上时,
.
![](https://img.xkw.com/dksih/QBM/2023/1/11/3150400200663040/3151275248336896/STEM/d5f687378a3e4fc2933d7cb0c2f15b42.png?resizew=444)
(1)
的长为 ;
(2)求
关于
的函数关系式,并直接写出自变量
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.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/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0409dcc992e45d68b10278f941b0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.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/7288d0b18af1a4be7f8df09af45df1c9.png)
![](https://img.xkw.com/dksih/QBM/2023/1/11/3150400200663040/3151275248336896/STEM/d5f687378a3e4fc2933d7cb0c2f15b42.png?resizew=444)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
2023九年级下·全国·专题练习 查看更多[2]
(已下线)专题11 A字型相似模型-【微专题】2022-2023学年九年级数学下册常考点微专题提分精练(人教版)(已下线)黄金卷03-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(安徽专用)
更新时间:2023-01-12 16:28:48
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】已知,在平面直角坐标系中,矩形
的边
在
轴正半轴上,边
在
轴的正半轴上,且
,
,
,
,点
为
上一点,将矩形沿
翻折,使点
落在
边上的点
处.
(1)求点
的坐标.
(2)动点
从点
出发以每秒
个单位的速度沿
轴向右运动,连接
,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
的面积为
,点
运动的时间为
,请用含
的式子表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
的面积
,并直接写出
的取值范围.
(3)在(2)的条件下,在点
运动过程中,在平面内取一点
,使
、
、
、
四个点组成的四边形为菱形,请求出满足条件的
值及
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ce699ee1799ab5a675a30b8d007349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbae7f91c21b7bd1ffdd960400343721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ef8da8648376509218031311dfdc9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fb378d6bf91902efa15881985c5e69.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/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/2/d694dac2-f0f6-4d69-a541-5d30b0cba5be.png?resizew=565)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在(2)的条件下,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/dad2a36927223bd70f426ba06aea4b45.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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
|
较难
(0.4)
【推荐2】在等边三角形
中,
,点D、E、F分别是
、
、
边上的中点,连接
、
.动点
从点
出发,沿
方向以
的速度运动,到点
运动停止.过点
作
,垂足为点
,过点
作
交
于点
.设点
运动时间为
,
与四边形
重叠面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/2/180b1612-c9ca-4464-baa2-0684d488b5aa.png?resizew=130)
(1)当点
与点
重合时,
的值为___________;
(2)求
与
的函数解析式;
(3)直接写出线段
经过
边上中点时
的值为___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5408d7a9509a42172ed12c0ca70693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f66e14dcc53c3ce0be765f9a5db406.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca5db390ce7350fc7b6893acf65db13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418cb34a5390475fa6d36394282d2142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d7e63df0d190a86c1cd46e4765ab3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2443a94bed3d2b1f95c04ebd61ac134a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eacd892f03da01942140679667792250.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/2/180b1612-c9ca-4464-baa2-0684d488b5aa.png?resizew=130)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/2/1e7a0c19-51e7-4827-9280-d24f483d4944.png?resizew=137)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d7e63df0d190a86c1cd46e4765ab3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
真题
【推荐1】【阅读理解】如图1,
,
的面积与
的面积相等吗?为什么?
![](https://img.xkw.com/dksih/QBM/2021/6/26/2751478865797120/2752673953710080/STEM/c7eaf54e-b444-4079-b54a-323a8e6a0989.png?resizew=164)
解:相等,在
和
中,分别作
,
,垂足分别为
,
.
,
.
,
四边形
是平行四边形,
.
又
,
,
.
【类比探究】问题①,如图2,在正方形
的右侧作等腰
,
,
,连接
,求
的面积.
![](https://img.xkw.com/dksih/QBM/2021/6/26/2751478865797120/2752673953710080/STEM/bbed999a-b134-4063-9bb0-33adc14d6c21.png?resizew=149)
解:过点
作
于点
,连接
.
请将余下的求解步骤补充完整.
【拓展应用】问题②,如图3,在正方形
的右侧作正方形
,点
,
,
在同一直线上,
,连接
,
,
,直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdb9d8425d73a68731f30e0c0e22260.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://img.xkw.com/dksih/QBM/2021/6/26/2751478865797120/2752673953710080/STEM/c7eaf54e-b444-4079-b54a-323a8e6a0989.png?resizew=164)
解:相等,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a127eecc051e9308f9e708b7df53533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e365b4a6fc8286a79888b1b2bbef5ea.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/63b42667da10bb83088c5553eaaddfb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad6fa1c37c33cb40048b7bd3c5cbe6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ddb6257419fad3c1783880fc10f64d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3411384689995f6c3ff4108d1ffcbad.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77708d312877dedd42d34da4fd9b3ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b875ca7389cd6dff6dcf3a5e8a7a11e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb855da833db32b6f79ba8f833a889e1.png)
【类比探究】问题①,如图2,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686171942bd7698035016c732db43b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/2021/6/26/2751478865797120/2752673953710080/STEM/bbed999a-b134-4063-9bb0-33adc14d6c21.png?resizew=149)
解:过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6cc3789c0e9b7d1226aa0de3327599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
请将余下的求解步骤补充完整.
【拓展应用】问题②,如图3,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
![](https://img.xkw.com/dksih/QBM/2021/6/26/2751478865797120/2752673953710080/STEM/4d0ce6c2-0272-4249-ab0b-53d2542fbc86.png?resizew=165)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】在正方形
中,线段
交对角线
于点G.
(1)如图1,若点E、F分别在
、
边上,且
,求证:
;
(2)如图2,若点E在
边上,点F在
边的延长线上,且
.(1)中结论是否依然成立?请说明理由;
(3)在(2)的条件下,连接
并延长交
于点H,若
,
.求正方形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/12/bfd8cb64-62c4-4185-b54a-a2caf1c154fa.png?resizew=533)
(1)如图1,若点E、F分别在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/690c06742fc47007c6a078ede7ecabf6.png)
(2)如图2,若点E在
![](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/d8ce1475f537b4ad21775bfaa16daa0c.png)
(3)在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe49abfd436a012126ca65b63be66c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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,在△ABC中,∠ACB=90°,tanA=
,AC=6
,以BC为斜边向右侧作等腰直角△EBC,P是BE延长线上一点,连接PC,以PC为直角边向下方作等腰直角△PCD,CD交线段BE于点F,连接BD.
(1)求证:PC:CD=CE:BC;
(2)若PE=n(0<n≤4),求△BDP的面积;(用含n的代数式表示)
(3)当△BDF为等腰三角形时,请直接写出线段PE的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0e7bfbd56fe73dfe04c04da749d942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
(1)求证:PC:CD=CE:BC;
(2)若PE=n(0<n≤4),求△BDP的面积;(用含n的代数式表示)
(3)当△BDF为等腰三角形时,请直接写出线段PE的长度.
![](https://img.xkw.com/dksih/QBM/2019/4/23/2188507410022400/2189823574409216/STEM/d35a1598233f4cf4b7f22bb55f154432.png?resizew=525)
您最近一年使用:0次
【推荐2】在矩形ABCD中,AB=3.
(1)点E,F分别在边BC,CD上,
①点B,F关于AE所在的直线对称,且E为线段BC的一个四等分点,求线段AD的长度.
②已知FC=2,以A,B,E为顶点的三角形与△EFC相似,设BE=a,EC=b,求a,b的关系式.
(2)已知BC=4,点E,F分别在射线BC,直线CD上,以A,E,F为顶点的三角形与△EFC能否相似?若能,求CF的长;若不能,试说明理由.
(1)点E,F分别在边BC,CD上,
①点B,F关于AE所在的直线对称,且E为线段BC的一个四等分点,求线段AD的长度.
②已知FC=2,以A,B,E为顶点的三角形与△EFC相似,设BE=a,EC=b,求a,b的关系式.
(2)已知BC=4,点E,F分别在射线BC,直线CD上,以A,E,F为顶点的三角形与△EFC能否相似?若能,求CF的长;若不能,试说明理由.
![](https://img.xkw.com/dksih/QBM/2020/8/12/2526416108322816/2526710207569920/STEM/6711115215ec40fc8c1a07ba814676f7.png?resizew=125)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在
中,
,
,
,动点D从点B出发,以每秒1个单位长度的速度沿
向点A运动,到达点A停止运动,过点D作
交射线
于点E,以
、
为邻边作平行四边形
.设点D运动时间为t秒,平行四边形
与
的重叠部分面积为S.
![](https://img.xkw.com/dksih/QBM/2020/12/10/2618281950191616/2620531245408256/STEM/4b642c7d-b4ff-4adb-8bc9-992cd6a6f92b.png?resizew=135)
(1)当点F落在
边上时,求t的值;
(2)求S关于t的函数解析式,并直接写出自变量t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8daff96303a07819bd4ee47731e73b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac66de8543430fd51e7c18042e626dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac66de8543430fd51e7c18042e626dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://img.xkw.com/dksih/QBM/2020/12/10/2618281950191616/2620531245408256/STEM/4b642c7d-b4ff-4adb-8bc9-992cd6a6f92b.png?resizew=135)
(1)当点F落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求S关于t的函数解析式,并直接写出自变量t的取值范围.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,矩形
中,
厘米,
厘米,点E从A出发沿
匀速运动,速度为1厘米/秒;同时,点F从C出发沿对角线
向A匀速运动,速度为1厘米/秒,连接
,设运动时间为t秒.请解答以下问题:
时
①t为何值时,
;
②设
的面积为y,求y关于t的函数;
(2)当
时,满足条件
,t的值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5864483b7a92e2936cf128482984ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e3fe36b9961265df2f04c33e8e17be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b65912784543a113b1e1c86e162b4537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a5734077dda25a1604262ca08e4f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272ac51e5eda2e37518ed841746eaea1.png)
①t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfffc4b756bd8b93304efc27c3d7b41.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce8856176b33c2070d4d6f48120e73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ba6d3b1bdd885986232092e2c3c489.png)
您最近一年使用:0次