(1)如图①,在
中,
,
,垂足为D.求证
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/56e72584-ff0c-4abc-80f1-42685085d399.png?resizew=185)
(2)已知点C在线段AB上.在图②中,用直尺和圆规作出所有 的点P,使得
.(保留作图痕迹,不写作法)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/7bcb47fb-67db-40ae-80f2-a269206aecd0.png?resizew=148)
(3)如图③,在
中,
,点D在边AB上,
,连接CD.若线段CD上存在点P(包含端点),使得
,则
的取值范围是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46a68fd4c02644dde5c0a628677319a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/56e72584-ff0c-4abc-80f1-42685085d399.png?resizew=185)
(2)已知点C在线段AB上.在图②中,用直尺和圆规作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b049443704b40e3507a9b0a173efa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/7bcb47fb-67db-40ae-80f2-a269206aecd0.png?resizew=148)
(3)如图③,在
![](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/5f6c6426f8f8826f3f15e20fda9e1cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/566906cc85dd57d950b281a7afcf6924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e7e01495050cca64f635c2c2658157.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/d55edebe-6826-4d19-9d5b-92468307a2e9.png?resizew=188)
22-23九年级上·江苏南京·期末 查看更多[3]
江苏省南京市玄武区2022-2023学年九年级上学期期末数学试题(已下线)专题04相似三角形的性质与判定(八大类型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(苏科版)(已下线)专题14解答压轴题2(精选80道) -【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(苏科版)
更新时间:2023-03-09 12:44:11
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相似题推荐
解答题-作图题
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【推荐1】如图①,在平面直角坐标系中,点A的坐标为
,点B为x轴上一点,进行如下操作:
①连接
,分别以A,B为圆心,大于
长为半径,在
两侧作弧,两弧交于M,N两点,过
作直线
;
②过点B作x轴的垂线
交直线
于点P;
③多次移动点B的位置,得到对应的点P,将这些点用平滑的曲线连接起来,发现该曲线为抛物线.
(1)请用无刻度的直尺和圆规在图①中作出直线
;(要求:不写作法,保留作图痕迹,使用2B铅笔作图)
(2)设点P的坐标为
,求点P形成抛物线的表达式;
(3)如图②,一个横截面为抛物线形的单向隧道,其高为3米,且近似满足点P形成的抛物线表达式,若规定车辆顶部与隧道有不少于
米的空隙,则宽为2米的货车通过隧道的最大高度应为什么米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7ede0702d2c873101e9564545d9d3c.png)
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
②过点B作x轴的垂线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
③多次移动点B的位置,得到对应的点P,将这些点用平滑的曲线连接起来,发现该曲线为抛物线.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/a255c71d-0e9d-4d9d-a015-2ac9f925c5db.png?resizew=499)
(1)请用无刻度的直尺和圆规在图①中作出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)设点P的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9aa1d34d66a6876aa0566c8fc8b0a.png)
(3)如图②,一个横截面为抛物线形的单向隧道,其高为3米,且近似满足点P形成的抛物线表达式,若规定车辆顶部与隧道有不少于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
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【推荐2】如图,在
中,
,点D为边
上一点.
上找一点E,使得
.
(2)在(1)的条件下以点E为圆心,
为半径的圆分别与
,
交于M,N点,且
.求证:
与
相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364f0306622ea94958890090ef8cbd2b.png)
(2)在(1)的条件下以点E为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.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/f9c8c8f3d31eae489fd47ce84414b824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5ab74296abcbcf994c02b5834cd699.png)
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【推荐3】【问题背景】
人教版九年级下册教材第58页第11题:如图1,一块材料的形状是锐角三角形
,边
,高
.把它加工成正方形零件,使正方形的一边在
上,其余两个顶点分别在
上,这个正方形零件的边长是多少?
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/aa33563a-7202-4eff-8b83-75175b521659.png?resizew=156)
【提出问题】
在满足正方形的一边在三角形的一边上,其余两个顶点分别在另外两边上的条件下,能否在上面的材料上,加工一个面积更大的正方形?如何用直角尺(只能画直角)和圆规画出这个正方形?
【分析问题】
小敏认为,由于正方形的一边在三角形的一边上,这样就存在三种可能.在已知三边长度的情况下,可以通过计算,分别求出三个正方形的边长,然后比较三条边长的大小,进而知道面积最大的正方形;也可以结合当前所学的位似,分别画出满足条件的正方形,再利用圆规比较三个正方形的边长的大小,即可解决问题.
【解决问题】
为了简化探索过程,小敏取边长分别为
的三个等腰三角形(其中
为腰)木块进行研究.
如图2,正方形
的顶点
分别在
上,边
在
上.如图3,正方形
的顶点
分别在
上,边
在
上.
请你完成下面两个问题:
(1)通过计算,比较这两个正方形的边长的大小;
(2)在图4中,用直角尺(只能画直角)和圆规画出面积最大的正方形,使其一边在三角形的一边上,其余两个顶点分别在另外两边上(保留画图痕迹).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/d4bbea38-49e2-467e-8686-00803bd9784c.png?resizew=460)
【学以致用】
定义:由组成圆心角的两条半径和圆心角所对的弧围成的图形叫做扇形.
小敏类比上面的研究方法,又提出下面问题:
在如图5所示的扇形中,能否用直角尺和圆规画出一个正方形,使其两个顶点在弧上,另外两个顶点在半径上?
你认为可以吗?如果可以、在图中画出符合条件的正方形(保留画图痕迹);如果不可以,说明理由.
人教版九年级下册教材第58页第11题:如图1,一块材料的形状是锐角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf57eef2bac6f23b54d87bd128fac25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b268b2129e91d0af3423f2c001653d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/aa33563a-7202-4eff-8b83-75175b521659.png?resizew=156)
【提出问题】
在满足正方形的一边在三角形的一边上,其余两个顶点分别在另外两边上的条件下,能否在上面的材料上,加工一个面积更大的正方形?如何用直角尺(只能画直角)和圆规画出这个正方形?
【分析问题】
小敏认为,由于正方形的一边在三角形的一边上,这样就存在三种可能.在已知三边长度的情况下,可以通过计算,分别求出三个正方形的边长,然后比较三条边长的大小,进而知道面积最大的正方形;也可以结合当前所学的位似,分别画出满足条件的正方形,再利用圆规比较三个正方形的边长的大小,即可解决问题.
【解决问题】
为了简化探索过程,小敏取边长分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3316ca3617d26c77cd90f9d9cb8ecf19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
如图2,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c869892d803fdca5767b219cdc4bacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4515e1dff9a852b3294dc1d6488a5748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
请你完成下面两个问题:
(1)通过计算,比较这两个正方形的边长的大小;
(2)在图4中,用直角尺(只能画直角)和圆规画出面积最大的正方形,使其一边在三角形的一边上,其余两个顶点分别在另外两边上(保留画图痕迹).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/d4bbea38-49e2-467e-8686-00803bd9784c.png?resizew=460)
【学以致用】
定义:由组成圆心角的两条半径和圆心角所对的弧围成的图形叫做扇形.
小敏类比上面的研究方法,又提出下面问题:
在如图5所示的扇形中,能否用直角尺和圆规画出一个正方形,使其两个顶点在弧上,另外两个顶点在半径上?
你认为可以吗?如果可以、在图中画出符合条件的正方形(保留画图痕迹);如果不可以,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/573a0eee-7bf3-4fb0-8f27-fb4de1e29780.png?resizew=93)
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解答题-作图题
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【推荐1】按要求作图:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/84d7bbc4-e148-4f1c-9ee5-db4d23a3d05a.png?resizew=535)
(1)如图1,在正方形网格中,有一圆经过了两个小正方形的顶点A,B,利用无刻度直尺画出这个圆的一条直径;
(2)如图2,BA,BD是⊙O中的两条弦,C是BD上一点,BAC50,利用无刻度直尺在图中画一个含有50角的直角三角形;
(3)如图3,利用无刻度直尺和圆规,以AB边上一点O为圆心,过A、D两点作⊙O(不写作法,保留作图痕迹);
(4)如图4,AB与圆相切,且切点为点B,利用无刻度直尺在网格中找出点B的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/84d7bbc4-e148-4f1c-9ee5-db4d23a3d05a.png?resizew=535)
(1)如图1,在正方形网格中,有一圆经过了两个小正方形的顶点A,B,利用无刻度直尺画出这个圆的一条直径;
(2)如图2,BA,BD是⊙O中的两条弦,C是BD上一点,BAC50,利用无刻度直尺在图中画一个含有50角的直角三角形;
(3)如图3,利用无刻度直尺和圆规,以AB边上一点O为圆心,过A、D两点作⊙O(不写作法,保留作图痕迹);
(4)如图4,AB与圆相切,且切点为点B,利用无刻度直尺在网格中找出点B的位置.
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【推荐2】如图,在每个小正方形的边长为1的网格中,四边形
的顶点
,
,
均落在格点上.点
是小正方形一边的中点,连接
.
(1)线段
的长等于__________ ;
(2)以线段
为直径作
,试确定圆心
的位置,并在线段
上找一点
,满足
,请用无刻度 的直尺,在如图所示的网格中,画出点
和点
,并简要说明点
,点
的位置是如何找到的(不要求证明)__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/26/912c667e-de8e-4b66-8ff1-39c92f1060bc.png?resizew=150)
(1)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)以线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2c9c32921b9f678056406dbb27fd9b.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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名校
【推荐1】如图,抛物线
:
与
轴交于
两点,与
轴交于点
.
(1)直接写出抛物线
的解析式;
(2)如图,有一宽度为
的直尺平行于
轴,直尺两长边被线段
和抛物线
截得两线段
、
.设点
的横坐标为
,且
,当
为何值时四边形
为平行四边形;
(3)在(2)的条件下连
、
,当直尺平行移动时,
与
能否相等,若能求出
的值,若不能请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54a8be30027913cafd270835828f2ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/8b3131de-f7a4-4908-8af7-1c47bf7bd025.png?resizew=469)
(1)直接写出抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)如图,有一宽度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87448e09eaa816e50ae92d111d5ded6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb4337e61fdb8a9e216273edab4579c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48cc00412f1076a27ef5268ba840896b.png)
(3)在(2)的条件下连
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7feef9ddfcd5215dcf3c2f28fc497ba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5e66e7d6f41ac4d8c861392e8bd06f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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名校
【推荐2】如图,已知
是
的弦,点
、
是
上的两个点,
交
于点
,连结
,
.
是
的中点.
(2)若
,求
的值.
(3)若
,则
的值是否为定值?如果是,请求出其值;如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.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/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c3f982d999937891eec4cb22d62e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4e0319de95ba176be869b47d273149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32577573853a4593011143e3c63f1c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78dc4f4584665f0db3d9363784c1683.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81246196eff78f9b6791b4d538e7866.png)
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较难
(0.4)
解题方法
【推荐1】如图,直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3396afb3d7e0b3595a79e63b04e43c60.png)
交
轴于点
,交
轴于点
,直线
交
轴于点
,交
轴于点
,交直线
于点
,过点
作
轴,垂足为
,且
.
![](https://img.xkw.com/dksih/QBM/2021/6/12/2741613873455104/2744419683491840/STEM/60b4e8f8-366a-40d3-b49a-751b6d3a657d.png)
(1)求
的值;
(2)
为线段
上一点,过点
作
的垂线,交
轴于点
,设点
的横坐标为
,线段
的长为
,求
与
的函数关系式;
![](https://img.xkw.com/dksih/QBM/2021/6/12/2741613873455104/2744419683491840/STEM/106a0451-da6e-40e6-bfb3-eb81e70fe927.png)
(3)在(2)的条件下,连接
交
于点
,且
,点
在线段
上,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3396afb3d7e0b3595a79e63b04e43c60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6c9edc93f40b4acbe1a042c1df246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c820c90a47b03ee1e229ee50dff48a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a0642d945df967d5c6e60b845fb76d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c820c90a47b03ee1e229ee50dff48a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f57f005a9592ea89ae2a2cee6598c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/78b4e2ad842cdc7d86da465631ca77ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d67cb60f19af87f1a1e893f8cf0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee03c566c0e7ce78d451053997eea8b9.png)
![](https://img.xkw.com/dksih/QBM/2021/6/12/2741613873455104/2744419683491840/STEM/60b4e8f8-366a-40d3-b49a-751b6d3a657d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dfc90d009f029db1401a71e5d3f859.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b85bce5b3532a34cda2ee181ac373c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45b3119e3afc81be5e3be1795905c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad4f07e5f69877c9fe07580a6bc7201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bbd4c060ed1608d8ce324eafadbca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384cde358105707fea1f74cd5f5c3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bbd4c060ed1608d8ce324eafadbca4.png)
![](https://img.xkw.com/dksih/QBM/2021/6/12/2741613873455104/2744419683491840/STEM/106a0451-da6e-40e6-bfb3-eb81e70fe927.png)
(3)在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ccbf1c82b1b330063016e3c5332d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a60784afeeb5b701624b81ef023ad5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://img.xkw.com/dksih/QBM/2021/6/12/2741613873455104/2744419683491840/STEM/ae9f25b3-554a-4c30-89f6-009686fea27b.png)
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,
,
,点
在
边上,与点
、
不重合,过点
作
的垂线与
的延长线相交于点
,连结
,交
于点
.
(1)当
为
的中点时,求
的长;
(2)当
是以
为腰的等腰三角形时,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b1927db96d84f27197b5a654b622f6.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d480e8b2c516612b47a19cb62d9bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324e464fecd30ea2eef67e934be0f288.png)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458337689493504/2458510752866304/STEM/12b41e2e0eba4340ab2a43c82e653a5a.png?resizew=117)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】点P在四边形
的对角线
上,直角三角板
的直角边
,
分别交
,
边于点M,N.
对角线
,
的交点,当点Р在点O处时,无论三角板
绕点O怎样转动,我们发现,三角板与正方形重叠部分的面积总等于______;
【类比探究】(2)如图2,在(1)的条件下,改变点Р的位置(P在对角线AC上),若
,则有
.
下面是该结论的证明过程:
证明:过点P作
于点G,作
于点H,
……
请按以上证明思路完成剩余的证明过程;
【迁移探究】(3)如图3,在(2)的条件下,将“正方形
”改为“矩形
”,且
,
,其他条件不变.若
,且
过点B,直接写出
的长.
![](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/9d246f9eceab371ebf47a47c2f11a4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
【类比探究】(2)如图2,在(1)的条件下,改变点Р的位置(P在对角线AC上),若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d52f125abf9625888d5feb7d6d2b5fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf295b3a70996eb918ae1a823e1747c.png)
下面是该结论的证明过程:
证明:过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d7566369c178316219bb466a66d062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef7eab528a8dd3e3f328de3b3ac80ee.png)
……
请按以上证明思路完成剩余的证明过程;
【迁移探究】(3)如图3,在(2)的条件下,将“正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92d71107894329b293117036013dcbda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
您最近一年使用:0次