1 . 如图,抛物线
交
轴于点
、
,交
轴于点
,点的
坐标为(3,0),点的
坐标为(0,3),点
与点
关于抛物线的对称轴对称.
(1)求抛物线的解析式;
(2)若点
为抛物线对称轴上一动点,连接
,以
、
为边作平行四边形
,是否存在这样的点
,使平行四边形
是矩形?若存在,请求出点
的坐标;
(3)在(2)的结论下,求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.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/d053b14c8588eee2acbbe44fc37a6886.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)求抛物线的解析式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd8fadb50683aada964947493b29c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd8fadb50683aada964947493b29c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在(2)的结论下,求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec0852769124ee57b1ba58eb71d3ba7.png)
![](https://img.xkw.com/dksih/QBM/2020/9/28/2559580509257728/2565351613472768/STEM/0cadd69ae39844e18414904c062951b2.png?resizew=464)
您最近一年使用:0次
2020-10-06更新
|
364次组卷
|
2卷引用:2020年广西百色市右江区九年级毕业暨升学考试二模数学试题
2 . 如图,
为等腰
的底
的中点,过
作
∥
,连结
;
,
,
,动点
自
点出发,在
上匀速运动,动点
自点
出发,在折线
上匀速运动,速度均为
,当其中一个动点到达终点时,它们同时停止运动,设点
运动
时,
的面积为
(不能构成
的动点除外)
(1)点
在
上运动时,求
的取值范围;
(2)当点
在
上运动时,求
为何值时,
是等腰三角形;
(3)求
与
之间的函数关系式;当
为何值时,
有最大值?最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37a89095ca23aa8691b685e1bd2f359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df157ae1fd49584429d65a2f535893.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9853c90ab11d8bf821168accaffb8c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af169e1a6c6c59af61c9d01f1d1dd26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a9dabb53dc826019fc8b6ae6d940c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a9dabb53dc826019fc8b6ae6d940c5.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a9dabb53dc826019fc8b6ae6d940c5.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.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/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/6c294508-33d5-49dd-a6ee-e845120fdbd4.png?resizew=309)
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名校
解题方法
3 . 如图,在正方形
中,点
是
边上一点,且
,连接
交对角线
于点
,点
是对角线
上一点且
,过点
作
于点
,连接
,将
沿
翻折,得到
,连接
交
于点
,若
,则
的长度为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe226b8416144921430e853355f3608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/decb7e540ea7394e2040d97645e85171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179231788195dba7f08545a02b47883b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cbe493541ce13a176048d14fbdf003f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21912efc23ff4597552a7e51be539f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4e0222efb9f3030a6bec075b153dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/754b54d9-e675-46cb-9e9f-641fb3abb4d6.png?resizew=158)
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2020-10-04更新
|
458次组卷
|
2卷引用:重庆一中初2020-2021学年九年级上学期入学考试数学试题
名校
4 . 已知在
和
中,
,
,
,
.
(1)如图1,若
,
、
、
三点共线,连接
:
①若
,求
长度;
②如图2,若点
是
中点,连接
,
,求证:
;
(2)如图3,若点
在线段
上,且
,试直接写出
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9603bd94874319907e2e14f3501dd07f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a5594708b3d94026c639aff4446b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfe5ce05999cea317ff1e5c2213e238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71f46e48a26e78c51a22ef609e25d0c.png)
(2)如图3,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18576dfcea260d8fb38f4e85762627e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://img.xkw.com/dksih/QBM/2020/9/26/2558355412549632/2563268492222464/STEM/bf4f027c07544ce7bbcfdead0deca75c.png?resizew=451)
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解题方法
5 . 在△ABC中,AC=BC=2,∠C=90°,将一块等腰直角三角板的直角顶点放在斜边AB的中点P处,将三角板绕点P旋转,三角板的两直角边分别交射线AC、CB于D、E两点,图1,2,3是旋转三角板得到的图形中的3种情况。
研究:
(1)三角板绕点P旋转,观察线段PD和PE之间有什么数量关系,并结合图2加以证明;
(2)三角板绕点P旋转,△PBE是否能成为等腰三角形?若能,指出所有情况(即写出△PBE为等腰三角形时CE的长);若不能,请说明理由;
(3)若将三角板的直角顶点放在斜边AB上的M处,且AM:MB=1:n,和前面一样操作,试问线段MD和ME之间有什么数量关系?并结合图4加以证明
研究:
(1)三角板绕点P旋转,观察线段PD和PE之间有什么数量关系,并结合图2加以证明;
(2)三角板绕点P旋转,△PBE是否能成为等腰三角形?若能,指出所有情况(即写出△PBE为等腰三角形时CE的长);若不能,请说明理由;
(3)若将三角板的直角顶点放在斜边AB上的M处,且AM:MB=1:n,和前面一样操作,试问线段MD和ME之间有什么数量关系?并结合图4加以证明
![](https://img.xkw.com/dksih/QBM/2020/9/24/2556781023666176/2558214710468608/STEM/45e56b73-d0e6-46ba-882c-58db8b51f74f.png)
您最近一年使用:0次
6 . 如图1,矩形的边OA在x轴上,边OC在y轴上,点B的坐标为(6,8).D是AB边上一点(不与点A、B重合),将△BCD沿直线CD翻折,使点B落在点E处.
(1)求直线AC所表示的函数的表达式;
(2)如图2,当点E恰好落在矩形的对角线AC上时,求点D的坐标;
(3)如图3,当以O、E、C三点为顶点的三角形是等腰三角形时,求△OEA的面积.
(1)求直线AC所表示的函数的表达式;
(2)如图2,当点E恰好落在矩形的对角线AC上时,求点D的坐标;
(3)如图3,当以O、E、C三点为顶点的三角形是等腰三角形时,求△OEA的面积.
您最近一年使用:0次
2020-09-21更新
|
443次组卷
|
5卷引用:江苏省泰州市兴化市2019-2020学年八年级下学期期中数学试题
17-18九年级·浙江杭州·期末
解题方法
7 . 如图,在矩形
中,
.E为
边上的一个动点,以
为边作正方形
与
交于点H,
的延长线交
于点M,连结
.
(1)当
时,求
的长(用含a的代数式表示);
(2)试证
是一个定值;
(3)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f2f82a7afea8d0be9a6105a0cd22ae.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/6d8a79c320a70d74adc4276dc0a5306a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4144d1b055378346a7db965b752f4267.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/18/9ec9154b-ccc3-4dd3-b014-f7b9ba34ffa8.png?resizew=134)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eea9a51e920a7c409d285e96ea90855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
(2)试证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5364c67b06b70ea50dd7f0ecb9301cfe.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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名校
解题方法
8 . 问题提出:
问题探究:
(2)如图②,已知Rt△ABC中,∠ACB=90°,AB=10,sin∠ABC=
,D为AB中点,点E为AC边上的一个动点,请求出△BDE周长的最小值.
问题解决:
(3)如图③,有一个矩形花坛ABCD.AB=10m,AD=24m,根据设计造型要求,在AB上任取一动点E、连ED,过点A作AF⊥ED,交DE于点F,在FD上截取FP=
AF,连接PB、PC;现需在△PBC的区内种植一种黄色花卉,在矩形内的其它区域种植一种红色花卉,已知种植这种黄色花卉每平方米需200元,种植这种红色花卉每平方米需180元,完成这两种花卉的种植至少需花费多少元?(结果保留整数,参考数据:
≈1.7)
问题探究:
(2)如图②,已知Rt△ABC中,∠ACB=90°,AB=10,sin∠ABC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
问题解决:
(3)如图③,有一个矩形花坛ABCD.AB=10m,AD=24m,根据设计造型要求,在AB上任取一动点E、连ED,过点A作AF⊥ED,交DE于点F,在FD上截取FP=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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解题方法
9 . 如果一条抛物线
(
)与
轴有两个交点,那么以该抛物线的顶点和这两个交点为顶点的三角形称为这条抛物线的“抛物线三角形”.
![](https://img.xkw.com/dksih/QBM/2020/9/10/2547023921217536/2551256167276544/STEM/9726c331c14746d5ab21bf4e205a5213.png?resizew=175)
(1)“抛物线三角形”一定是 三角形;若抛物线
(
)的“抛物线三角形”是等腰直角三角形,则
.
(2)如图,△OAB是抛物线
(
)的“抛物线三角形”,是否存在以原点O为对称中心的矩形ABCD?若存在,求出过O、C、D三点的抛物线的表达式;若不存在,说明理由.
(3)若抛物线
与直线
交点的横坐标均为整数,是否存在整数m的值使这条抛物线的“抛物线三角形”有一边上的中线长恰好等于这边的长?若存在,直接写出m的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2020/9/10/2547023921217536/2551256167276544/STEM/9726c331c14746d5ab21bf4e205a5213.png?resizew=175)
(1)“抛物线三角形”一定是 三角形;若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40d7213717e25a37cc634c2ce0a3563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)如图,△OAB是抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76a55834795eeb3df0e66d708cf9d8da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a90cac2f5202a3277076caca3aa467b.png)
(3)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf9cc18f6f43c5a31a7bcbb1f30ddd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9355031ea0b2dc9cef3777621bc6d38.png)
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10 . 如图,在矩形ABCD中,AB=10,AD=6,E是AB边上的一个动点,点F在射线EC上,点H在AD边上,四边形EFGH是正方形,过G作GM⊥射线AD于M点,连接CG,DG.
(1)求证:AH=GM;
(2)设AE=x,△CDG的面积为S,求S与x的函数关系式,并写出x的取值范围.
(1)求证:AH=GM;
(2)设AE=x,△CDG的面积为S,求S与x的函数关系式,并写出x的取值范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/8a151a25-d473-4c8f-808b-6aaca4d4dda1.png?resizew=384)
您最近一年使用:0次