如图,在矩形
中,
=8
,
=6
,动点
从点
出发,沿
以2
的速度向终点
匀速运动,同时点
从点
出发,沿
→
以4
的速度向点
匀速运动,到达点
后,继续沿
→
以3
的速度向终点
匀速运动.连结
,以
、
为边作□
,连结
交
于点
,设点
的运动时间为
(
),□
与矩形
重叠部分图形的面积为
².
(1)当点
在点
上,△
是等腰三角形时,求
的值.
(2)当点
在边
上,△
与△
相似时,求
的值.
(3)求
与
之间的函数关系式.
(4)当△
是等腰三角形时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb2f95b382b3711c5ab2187b7f2c5c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb2f95b382b3711c5ab2187b7f2c5c0b.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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f1ef61657c168572e0afba364935f8.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f1ef61657c168572e0afba364935f8.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f1ef61657c168572e0afba364935f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adebf238e0a8c30f0ef4729fba108899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adebf238e0a8c30f0ef4729fba108899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329801ede11867113c9cf51f31083b75.png)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4d7954c102c2ec592cfd1a832dab07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d6d85441a6edc4f92ee7e8aea4ec36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42fc809386ee98d913fb1f246dbe4e48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(4)当△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53936caa1e9a0b3fd457dc1ef7a6aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2017/11/8/1812906266279936/1815684402159616/STEM/a36d9f6a9cae41bb95a4f0ad3c9b88d6.png?resizew=130)
更新时间:2017-11-12 16:42:17
|
相似题推荐
解答题-问答题
|
困难
(0.15)
【推荐1】如图,四边形
为矩形,
为对角线,
,
,点
是
的中点,
、
两点同时从点
出发,点
沿射线
向右运动;点
沿线段
先向左运动至点
后,再向右运动到点
停止,点
随之停止运动.
、
两点运动的速度均为每秒1个单位.以
为一边向上作正方形
.设点
的运动时间为
(秒),正方形
与
重叠部分的面积为
.
![](https://img.xkw.com/dksih/QBM/2020/2/26/2407369169870848/2407548139405312/STEM/bff7903bd84547d8a3a8e43a66630b91.png?resizew=123)
(1)当点
在线段
上时,求出
的值.
(2)求出
与
之间的函数关系式,并直接写出取值范围(求函数关系式时,只须写出重叠部分为三角形时的详细过程,其余情况直接写出函数关系式.)
(3)在点
、点
运动的同时,有一点
以每秒1个单位的速度从
向
运动,当
为何值时,
是等腰三角形.请直接写出
的值或取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0e7136564a64ea4aac18e0190ea6a6.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/ab0e7136564a64ea4aac18e0190ea6a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/2020/2/26/2407369169870848/2407548139405312/STEM/bff7903bd84547d8a3a8e43a66630b91.png?resizew=123)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)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/2a30f3a8b673cc28bd90c50cf1a35281.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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119c4eea3d12c13cb6c8139085ac0e71.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2】如图,将一个正方形纸片
放置在平面直角坐标系中,点
,
.动点
在边
上,点
在边
上,沿
折叠该纸片,使点
的对应点
始终落在边
上(点
不与
,
重合),点
落在点
处,
与
交于点
.
(1)求点
的坐标;
(2)当点
落在
的中点时,求点
的坐标;
(3)当点
在边
上移动时,设
,求点
的坐标(用
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9040cff7e9e20dd2817ad9888237d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcbc328ed803646d8646560050ed0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b00c7d98aa59fe7e9b6001181ba542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fdbfd25e9e2f08861e0751c26e04cbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2020/7/2/2497411979493376/2498032648298496/STEM/d882f643-75ff-49de-a02c-8c59ff3be94b.png?resizew=182)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐1】勾股定理是人类最伟大的十个科学发现之一,西方国家称之为毕达哥拉斯定理.在我国古书《周髀算经》中就有“若勾三,股四,则弦五”的记载,我国汉代数学家赵爽为了证明勾股定理,创制了一幅“弦图”(如图1),后人称之为“赵爽弦图”,流传至今.
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705142044491776/2705268350312448/STEM/a8f7de1e-5c2d-48dc-b301-80ea8527624b.png)
(1)①请叙述勾股定理;
②勾股定理的证明,人们已经找到了400多种方法,请从下列几种常见的证明方法中任选一种来证明该定理;(以下图形均满足证明勾股定理所需的条件)
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705142044491776/2705268350312448/STEM/74875612-675f-4a0c-8ae6-58f197e722ad.png)
(2)①如图4、5、6,以直角三角形的三边为边或直径,分别向外部作正方形、半圆、等边三角形,这三个图形中面积关系满足
的有_______个;
②如图7所示,分别以直角三角形三边为直径作半圆,设图中两个月形图案(图中阴影部分)的面积分别为
,
,直角三角形面积为
,直接写出
的关系(无需证明);
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705142044491776/2705268350312448/STEM/b99284de-6fc1-4ff5-8236-e60bc9797b6e.png)
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705142044491776/2705268350312448/STEM/3de6930c-eaf6-4e48-aa52-d968f201c2f4.png)
(3)如果以正方形一边为斜边向外作直角三角形,再以该直角三角形的两直角边分别向外作正方形,重复这一过程就可以得到如图8所示的“勾股树”.在如图9所示的“勾股树”的某部分图形中,设大正方形M的边长为定值m,四个小正方形A,B,C,D的边长分别为a,b,c,d,已知
,则当
变化时,回答下列问题:(结果可用含m的式子表示)
①
_______;
②b与c的关系为_______,a与d的关系为_______.
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705142044491776/2705268350312448/STEM/a8f7de1e-5c2d-48dc-b301-80ea8527624b.png)
(1)①请叙述勾股定理;
②勾股定理的证明,人们已经找到了400多种方法,请从下列几种常见的证明方法中任选一种来证明该定理;(以下图形均满足证明勾股定理所需的条件)
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705142044491776/2705268350312448/STEM/74875612-675f-4a0c-8ae6-58f197e722ad.png)
(2)①如图4、5、6,以直角三角形的三边为边或直径,分别向外部作正方形、半圆、等边三角形,这三个图形中面积关系满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485fd8aa254b523bef30560500ccaf41.png)
②如图7所示,分别以直角三角形三边为直径作半圆,设图中两个月形图案(图中阴影部分)的面积分别为
![](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/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf4e20ea341827ce5f9552daee39462.png)
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705142044491776/2705268350312448/STEM/b99284de-6fc1-4ff5-8236-e60bc9797b6e.png)
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705142044491776/2705268350312448/STEM/3de6930c-eaf6-4e48-aa52-d968f201c2f4.png)
(3)如果以正方形一边为斜边向外作直角三角形,再以该直角三角形的两直角边分别向外作正方形,重复这一过程就可以得到如图8所示的“勾股树”.在如图9所示的“勾股树”的某部分图形中,设大正方形M的边长为定值m,四个小正方形A,B,C,D的边长分别为a,b,c,d,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c85e58813df85b253015a95156808e42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999b8b3d82838df3d1631f28fc7571ad.png)
②b与c的关系为_______,a与d的关系为_______.
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】 已知抛物线y=
x2+bx+c经过点A(-2,0),B(0,-4)与x轴交于另一点C,连接BC.
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420926322434048/2421574673801216/STEM/c5274848f79a4a0c883e86de0c27298f.png?resizew=270)
(1)求抛物线的解析式;
(2)如图,P是第一象限内抛物线上一点,BP交x轴于点E,且S△PBO=S△PBC,求证:E是OC的中点;
(3)在(2)的条件下求点P的坐标.
(4)在(2)的条件下拋物线上是否存在点D,使△ACD的面积与△ABP的面积相等?若存在,请求出点D的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420926322434048/2421574673801216/STEM/c5274848f79a4a0c883e86de0c27298f.png?resizew=270)
(1)求抛物线的解析式;
(2)如图,P是第一象限内抛物线上一点,BP交x轴于点E,且S△PBO=S△PBC,求证:E是OC的中点;
(3)在(2)的条件下求点P的坐标.
(4)在(2)的条件下拋物线上是否存在点D,使△ACD的面积与△ABP的面积相等?若存在,请求出点D的坐标;若不存在,请说明理由.
您最近一年使用:0次