在平面直角坐标系中,点A的坐标为(0,3),直线AB
x轴,在矩形OCDE中,OC=4,OE=3,以点C在第一象限内直线AB上时为初始位置,将矩形OCDE以点O为中心逆时针旋转,旋转角为α.直线OC,直线DE分别与直线AB相交于点M,N.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/39759c2e-aa06-4b16-adab-06b567285333.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/876dea86-8f17-47b1-a68b-40c2a20bc42f.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/3325e340-988d-4f01-a1e7-358c0f8ca24f.png?resizew=154)
(1)如图1,当顶点D落在直线AB上时(此时点N与点D重合).
①求证:△MAO≌△MCD;
②求点M的横坐标;
(2)如图2,当顶点D落在y轴正半轴上时,请直接写出点M的横坐标;
(3)在矩形OCDE旋转过程中,当0°<α<90°时,若AN=3AM,请直接写出此时点M的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/39759c2e-aa06-4b16-adab-06b567285333.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/876dea86-8f17-47b1-a68b-40c2a20bc42f.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/3325e340-988d-4f01-a1e7-358c0f8ca24f.png?resizew=154)
(1)如图1,当顶点D落在直线AB上时(此时点N与点D重合).
①求证:△MAO≌△MCD;
②求点M的横坐标;
(2)如图2,当顶点D落在y轴正半轴上时,请直接写出点M的横坐标;
(3)在矩形OCDE旋转过程中,当0°<α<90°时,若AN=3AM,请直接写出此时点M的横坐标.
更新时间:2022-09-06 17:57:09
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【推荐1】如图,长方形OABC中,O为平面直角坐标系的原点,A点的坐标为(4,0),C点的坐标为(0,6),点B在第一象限内,点P从原点出发,以每秒2个单位长度的速度沿着O—C—B—A—O的路线移动(即:沿着长方形移动一周).
(2)当点P移动了4秒时,描出此时P点的位置,并求出点P的坐标;
(3)在移动过程中,当点P到x轴距离为5个单位长度时,求点P移动的时间.
(2)当点P移动了4秒时,描出此时P点的位置,并求出点P的坐标;
(3)在移动过程中,当点P到x轴距离为5个单位长度时,求点P移动的时间.
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【推荐2】【问题情境】如图1,是一个工业开发区局部的设计图,河的同一侧有两个工厂A和B,AD、BC的长表示两个工厂到河岸的距离,其中E是进水口,D、C为污水净化后的出口.已知
,
,点D、E、C在同一直线上,
米,
米,那么两个排污口之间的水平距离
的长是 米.
【模型呈现】如图1,已知
,且
,证明
. 我们把这个数学模型称为“K型图”或“一线三等角”模型, 请写出完整的证明过程.
【模型应用】①在平面直角坐标系中,
如图2所示,
, 点A, B的坐标分别是
, 求点C的坐标.
②在①的条件下,在坐标平面内是否存在一点P(不与点C重合),使
与
全等?若存在, 请直接写出点P的坐标:若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dd56431bf42d1263a4c8cf8324d21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c8f81473e6883216cac3df278d777a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73a7c3f5045c0c228a5acb078c49007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1161100a412a4ca3fa308a3d2e7e5fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
【模型呈现】如图1,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ccbaed48889dbdcd134c6102ca9450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b0e5eeb1ecb6e71b7e497c971863c8.png)
【模型应用】①在平面直角坐标系中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e579cc6e90fc9532a7a4398ad6d3cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc30df40fb7a80442b66bc5aad1d063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/556f689e4712ca200a2d41993a84b530.png)
②在①的条件下,在坐标平面内是否存在一点P(不与点C重合),使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/4feef02f-e072-49ca-b78a-aedd23dda76b.png?resizew=479)
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【推荐1】如图,四边形
是菱形,E,F是对角线
上的两点,
.
(1)求证:
;
(2)求证:四边形
是平行四边形.
![](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/0e53497af8899cb299d762f1a4f46a55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/9/62cf41ef-6a8a-4d3d-b237-fe7fa1c6dabc.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77a5660627f246807b8ae7cdb456a0f.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bdae3d30abf70515bdbd45f9d0c380.png)
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【推荐2】如图,
为
的直径,
为
上的点,
是
的中点,
于点
,
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/e6d8648d-8bd0-477d-bf19-93775a644599.png?resizew=141)
(1)判断
与
的位置关系,并说明理由;
(2)连接
、
,若
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c6b459f86706727a9bd2e2360c4c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa30a9ee227af2b387cf6e028c20d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/e6d8648d-8bd0-477d-bf19-93775a644599.png?resizew=141)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
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【推荐3】阅读并完成相应的任务.如图,小明站在堤岸凉亭
点处,正对他的
点(
与堤岸垂直)停有一艘游艇,他想知道凉亭与这艘游艇之间的距离,于是制定了如下方案:
(1)任务一:根据题意将测量方案示意图补充完整;
(2)任务二:
①凉亭与游艇之间的距离是_______米;
②请你说明小明方案正确的理由.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
课题 | 测凉亭与游艇之间的距离 |
测量工具 | 皮尺等 |
测量方案示意图(不完整) | ![]() |
测量步骤 | ①小明沿堤岸走到电线杆![]() ![]() ②再往前走相同的距离,到达 ![]() ③他到达 ![]() ![]() |
测量数据 | ![]() ![]() ![]() |
(1)任务一:根据题意将测量方案示意图补充完整;
(2)任务二:
①凉亭与游艇之间的距离是_______米;
②请你说明小明方案正确的理由.
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【推荐1】如图,矩形ABCD中,E是BC上一点,将矩形沿AE翻折后,点B恰好与CD边上的点F重合.已知AB=5,AD=3
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/9b681cf0-0867-4135-9fef-9513e6d6106d.png?resizew=144)
(1)求BE;
(2)求tan∠EAF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/9b681cf0-0867-4135-9fef-9513e6d6106d.png?resizew=144)
(1)求BE;
(2)求tan∠EAF.
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【推荐2】如图,已知在平面直角坐标系中,矩形
的边
轴,
轴,点A的坐标为
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/8223aed1-81e6-4eeb-bf47-0d0e23c25255.png?resizew=180)
(1)求直线
的解析式;
(2)已知双曲线
与折线
的交点为E,与折线
的交点为F.
①连接
,当
时,求该双曲线的解析式,并求出此时点F的坐标;
②若双曲线
与矩形
各边和对角线
的交点个数为3,请求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ecbb94ac8dfe5fbc3bffad8c9da301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/053b5c78168646ce56f61d46f4e33aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/959e5ab675f526dfb54b05f8f82151b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02fcd95e6fd6ea1ec7cc880856846f7f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/8223aed1-81e6-4eeb-bf47-0d0e23c25255.png?resizew=180)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)已知双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a8b6fe6b9add4a965ac32c1fc51c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d78fc7fcb2762de28dcef8aa3aa0e49.png)
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ec75054bf2156df75fdbd2b76b7d89.png)
②若双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a8b6fe6b9add4a965ac32c1fc51c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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名校
解题方法
【推荐1】我们给出如下定义:若一个四边形中存在相邻两边的平方和等于一条对角线的平方,则称这个四边形为勾股四边形,这两条相邻的边称为这个四边形的勾股边.
(1)写出你学过的特殊四边形中是勾股四边形的两种图形的名称 , ;
(2)如图(1),已知格点(小正方形的顶点)
,
,
,请你画出以格点为顶点,
为勾股边且对角线相等的非长方形的勾股四边形
;并写出点M的坐标.
(3)如图(2),将
绕顶点
按顺时针方向旋转
,得到
,连结
,已知
.求证:
,即四边形
是勾股四边形.
(1)写出你学过的特殊四边形中是勾股四边形的两种图形的名称 , ;
(2)如图(1),已知格点(小正方形的顶点)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f751a17422fb04d7c55612b62b55f46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586d7140ec380af8c32bc216887477ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2186d147376d88c991d9b7308f1ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d071d008cdc313f6ed16a602f8a9669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de6c989fd224866658230526892e2bcb.png)
(3)如图(2),将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018be0ccd65fa3c759fe717f22b5e25d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba688c0db09be7b11e8796f645b39232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e371fbdd1ce24469994a5fcba5675b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2015/1/14/1573783253032960/1573783259168768/STEM/8616134412dc4d9b9126b513c8a8131b.png?resizew=497)
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名校
【推荐2】已知点P是线段AB上与点A不重合的一点,且AP<PB.AP绕点A逆时针旋转角
(0º<
≤90º)得到AE,同时BP也绕点B顺时针旋转相同的角度得到BF,连接PE、PF.
(1)如图1,当α=58º时,则∠
=______º;
(2)如图2,当点A、E、F三点在同一直线上时,
①求证:FP2=FE·FA;
②若BP=2AP,AB=6,求PF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)如图1,当α=58º时,则∠
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb64b597234df6eab4f92cf010c87fb.png)
(2)如图2,当点A、E、F三点在同一直线上时,
①求证:FP2=FE·FA;
②若BP=2AP,AB=6,求PF的长.
![](https://img.xkw.com/dksih/QBM/2021/10/13/2828377834356736/2828993554481152/STEM/e137866b-915e-429a-b049-7b7edc01cfe3.png)
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