1 . 在矩形ABCD中,AD,CD边的中点分别为E,F,连接BF,CE交于点G,若
,
,则BG的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1727d703243d23a6f8f403b65ad3a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/6cb9a323-ab28-4cb8-a7eb-441654cde529.png?resizew=175)
您最近一年使用:0次
2 . 问题背景:已知∠GDH的顶点在边BC所在直线上(不与B,C重合),DG交AB所在直线于点E、DH交AC所在直线于点F.记△BDE的面积为
,△CDF的面积为
.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966646875054080/2971554383740928/STEM/57720214-b799-48cf-a072-a53a80f908e0.png?resizew=683)
(1)初步尝试:如图1,当△ABC是等边三角形.
,
,且
,
时,
.
(2)类比探究:在(1)的条件下,沿BC方向平移∠GDH,使得
,如图2所示位置,则
.
(3)延伸拓展:当△ABC是等腰三角形时,
.
(Ⅰ)如图3当点D在线段BC上运动时,设
,
,
①求证:△BDE∽△CFD.
证明:
∵
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cc7db43b1e3c3255b497507a66610e.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba02910a01689f636c71116e96dfdf33.png)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
∴△BDE∽△CFD.
②直接写出
,
(结果用含m,π,β的三角函数表示).
(Ⅱ)如图4,当点D在BC的延长线上运动时,设
,
,求
的表达式(结果用含m,n,β的三角函数表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966646875054080/2971554383740928/STEM/57720214-b799-48cf-a072-a53a80f908e0.png?resizew=683)
(1)初步尝试:如图1,当△ABC是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08420da525b8cf84f7cf202d94cd7b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afedac49ce38f25e0a73e579133afe5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f01c4faacedfe56f5127d6c0cc63cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e59f3c0ac1fcc0dfc2076274776a57.png)
(2)类比探究:在(1)的条件下,沿BC方向平移∠GDH,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e59f3c0ac1fcc0dfc2076274776a57.png)
(3)延伸拓展:当△ABC是等腰三角形时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4d298836e57b7eab140cdb1574fd4ec.png)
(Ⅰ)如图3当点D在线段BC上运动时,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c4a6228026eb423be917b19e202794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3fd1b54bf975d0e97990247aab714.png)
①求证:△BDE∽△CFD.
证明:
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d4a059b3ad089f006db5998bce3fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5324ce5fd43c5b05e8fad764880f7b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cc7db43b1e3c3255b497507a66610e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba02910a01689f636c71116e96dfdf33.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
∴△BDE∽△CFD.
②直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9207a69d655849e6958adb701e1fda62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e59f3c0ac1fcc0dfc2076274776a57.png)
(Ⅱ)如图4,当点D在BC的延长线上运动时,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c4a6228026eb423be917b19e202794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3fd1b54bf975d0e97990247aab714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884d40a97fd767e95f34f3b91ab8d84c.png)
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3 . 如图,在
中,
,
,
,点O为边AC上的一点,以点O为圆心,半径为6作半圆O,与AC交于点D.
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965953398898688/2968144076537856/STEM/e4a090ed-0dae-4a84-8b28-39ae49767c68.png?resizew=310)
(1)如图1,BC与半圆O相切时,求证AB与半圆O相切;
(2)如图2,点O为AC中点时,将线段CD连同半圆O绕点C旋转.若半圆O与
的直角边相切,设切点为K,连接AK,求AK的长。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630b9ca3d20635161fa8fbf812b9128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965953398898688/2968144076537856/STEM/e4a090ed-0dae-4a84-8b28-39ae49767c68.png?resizew=310)
(1)如图1,BC与半圆O相切时,求证AB与半圆O相切;
(2)如图2,点O为AC中点时,将线段CD连同半圆O绕点C旋转.若半圆O与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
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4 . 已知
ABC与
DEC为直角三角形,
.
![](https://img.xkw.com/dksih/QBM/2022/4/1/2953685640708096/2963049214844928/STEM/a7e1faaa-4c42-4bee-98af-39386cc1c088.png?resizew=637)
(1)【问题发现】如图1,若
时,点D是线段AB上一动点,连接BE.则
______,
______°;
(2)【类比探究】如图2,若
,点D是线段AB上一动点,连接BE.请判断
的值及
的度数,并说明理由;
(3)【拓展延伸】如图3,在(2)的条件下,将点D改为直线AB上一动点,其余条件不变,取线段DE的中点M,连接BM、CM,若
,则当
CBM是直角三角形时,请求线段BE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://img.xkw.com/dksih/QBM/2022/4/1/2953685640708096/2963049214844928/STEM/a7e1faaa-4c42-4bee-98af-39386cc1c088.png?resizew=637)
(1)【问题发现】如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8a356ae65ad2cccdd27189efcea2da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75952e47a72c19dc1ad38a90801d6c07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0d8293dc1e7b9ebe2006a23470899d.png)
(2)【类比探究】如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17df03e1b7418a84e8f8a3d512b2c1e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274ae3f70122c99addb6df12405bac91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685516a27697104e83b311d76efa17aa.png)
(3)【拓展延伸】如图3,在(2)的条件下,将点D改为直线AB上一动点,其余条件不变,取线段DE的中点M,连接BM、CM,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
您最近一年使用:0次
5 . 【问题发现】
(1)如图所示,△ABC和△ADE均为正三角形,B、D、E三点共线.猜想线段BD、CE之间的数量关系为 ;∠BEC= °;
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149297270784/2959275059863552/STEM/25fb5d13-f07b-40d5-b661-cd19bd2c9424.png?resizew=164)
【类比探究】
(2)如图所示,△ABC和△ADE均为等腰直角三角形,∠ACB=∠AED=90°,AC=BC,AE=DE,其他条件同(1),请问(1)中的结论还成立吗?说明你的理由;
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149297270784/2959275059863552/STEM/ead6ccfb-7f64-43ed-a519-ede1115d9dd5.png?resizew=156)
【拓展延伸】
(3)如图所示,在△ABC中,∠ACB=90°,∠A=30°,AB=4,DE为△ABC的中位线,将△CDE绕点C旋转,当DE所在直线经过点A时,求BE的长.(直接写出答案)
(1)如图所示,△ABC和△ADE均为正三角形,B、D、E三点共线.猜想线段BD、CE之间的数量关系为 ;∠BEC= °;
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149297270784/2959275059863552/STEM/25fb5d13-f07b-40d5-b661-cd19bd2c9424.png?resizew=164)
【类比探究】
(2)如图所示,△ABC和△ADE均为等腰直角三角形,∠ACB=∠AED=90°,AC=BC,AE=DE,其他条件同(1),请问(1)中的结论还成立吗?说明你的理由;
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149297270784/2959275059863552/STEM/ead6ccfb-7f64-43ed-a519-ede1115d9dd5.png?resizew=156)
【拓展延伸】
(3)如图所示,在△ABC中,∠ACB=90°,∠A=30°,AB=4,DE为△ABC的中位线,将△CDE绕点C旋转,当DE所在直线经过点A时,求BE的长.(直接写出答案)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149297270784/2959275059863552/STEM/ee69e82d-8e93-4fb7-87f6-2746a99b3964.png?resizew=192)
您最近一年使用:0次
2022-04-16更新
|
192次组卷
|
3卷引用:2022年贵州省毕节市金沙县中考数学一模测试卷
6 . 在平面直角坐标系中,已知抛物线
与
轴交于
,
两点(点
在点
的左侧),与
轴交于点
,顶点为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/ae78b48d-8988-4143-8484-c2cf7819e398.png?resizew=603)
(1)当
时,直接写出点
,
,
,
的坐标;
(2)如图1,直线
交
轴于点
,若
,求
的值及直线
的解析式;
(3)如图2,在(2)的条件下,若点
为
的中点,连接
,动点
在第二象限的抛物线上运动,过点
作
轴的垂线,垂足为
,交
于点
,过点
作
,垂足为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c45fa324e3c10642824e4d9820195b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/ae78b48d-8988-4143-8484-c2cf7819e398.png?resizew=603)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f34f9141c604608c1834763e57c390.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)如图1,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc33cb390df7c808e1fa9701036497c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)如图2,在(2)的条件下,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f59cd2155b7c37563e8e56d9076ba32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ddeb7ce17137144641f061042c14fb.png)
您最近一年使用:0次
7 . 如图,在△ABC中,BC=10,AH⊥BC于点H,S△ABC=25,点D为AB边上的任意一点(不与点A、B重合),过点D作DE∥BC,交AC于点E.交AH于点F,以DE为折线将△ADE翻折,所得的△A'DE与四边形BCED重叠部分的面积记为S(点A关于DE的对称点A′落在AH所在的直线上).设DE=x.
![](https://img.xkw.com/dksih/QBM/2022/3/31/2948185823838208/2957571520716800/STEM/5e01f8c9650843608f42222ba833c3b0.png?resizew=337)
(1)当x=2时,重叠部分的面积S=______;
(2)在(1)的条件下,若点D、A'、C在同一直线上时,求BH的长;
(3)求S与x的函数关系式,并注明自变量x的取值范围.
![](https://img.xkw.com/dksih/QBM/2022/3/31/2948185823838208/2957571520716800/STEM/5e01f8c9650843608f42222ba833c3b0.png?resizew=337)
(1)当x=2时,重叠部分的面积S=______;
(2)在(1)的条件下,若点D、A'、C在同一直线上时,求BH的长;
(3)求S与x的函数关系式,并注明自变量x的取值范围.
您最近一年使用:0次
8 . 如图,在直角坐标系中,以5为半径的动圆的圆心A沿x轴移动,当⊙
与直线
只有一个公共点时,点A的坐标为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1daffe8a928de092d6a8509ccc1515af.png)
![](https://img.xkw.com/dksih/QBM/2022/4/11/2955882652647424/2956437139111936/STEM/12fa8f11-7ea3-4100-805d-cc8b1ce45874.png?resizew=173)
您最近一年使用:0次
2022-04-12更新
|
307次组卷
|
5卷引用:2024年贵州省安顺市关岭布依族苗族自治县部分学校 九年级 一模数学模拟试题
2024年贵州省安顺市关岭布依族苗族自治县部分学校 九年级 一模数学模拟试题2022年江苏省南京市中考一模模拟提高数学试题(已下线)押江苏南京中考数学第16题(几何与函数探究)-备战2022年中考数学临考题号押题(江苏南京专用)山东省淄博市桓台县2022-2023学年九年级上学期期末数学试题(已下线)黄金卷08-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(江苏南京专用)
9 . 如图,在
中,AB=AC,E是线段BC上一动点(不与B、C重合),连接AE,将线段AE绕点A逆时针旋转与
相等的角度,得到线段AF,连接
.点
和点
分别是边
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/7c58833d-17da-4a69-9182-fb6f8b868ea7.png?resizew=444)
(1)【问题发现】如图1,若
,当点E是
边的中点时,
____,直线
与
相交所成的锐角 的度数为______度.
(2)【解决问题】如图2,若
,当点E是
边上任意一点时(不与B、C重合),上述两个结论是否成立?若成立,请写出证明过程;若不成立,请说明理由.
(3)【拓展探究】如图3,若
,AB=6,
,在E点运动的过程中,直接写出GN的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/7c58833d-17da-4a69-9182-fb6f8b868ea7.png?resizew=444)
(1)【问题发现】如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3cf42a8dc862fbb78d6a780c420b24a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a3464e90637e0fe75461c44096e746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)【解决问题】如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3cf42a8dc862fbb78d6a780c420b24a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)【拓展探究】如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49938ca6628df6a0e2f71434802990b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336cf2082c1f8d6a97ca630c9e5b45f1.png)
您最近一年使用:0次
2022-04-07更新
|
533次组卷
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7卷引用:贵州省铜仁市石阡县2022-2023学年九年级下学期第五次质量监测数学试题
名校
10 . 如图1,抛物线
经过点A(4,3),对称轴是直线
=2,顶点为B.抛物线与
轴交于点C,连接AC,过点A作AD⊥
轴于点D,点E是线段AC上的动点(点E不与A、C两点重合).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/8684f87c-7a03-49f8-914f-0b1c0992b36c.png?resizew=413)
(1)求抛物线的函数解析式和顶点B的坐标;
(2)若直线BE将四边形ACOD分成面积比为1:3的两个四边形,求点E的坐标;
(3)如图2,连接DE,作矩形DEFG,在点E的运动过程中,是否存在点G落在
轴上的同时点F也恰好落在抛物线上?若存在,求出此时AE的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f18269e4b2c08f69b719c4c7e7d71733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/8684f87c-7a03-49f8-914f-0b1c0992b36c.png?resizew=413)
(1)求抛物线的函数解析式和顶点B的坐标;
(2)若直线BE将四边形ACOD分成面积比为1:3的两个四边形,求点E的坐标;
(3)如图2,连接DE,作矩形DEFG,在点E的运动过程中,是否存在点G落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
2022-04-02更新
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580次组卷
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12卷引用:2020年贵州省铜仁市中考数学3月模拟试题
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