如图1,
为
的对角线,
的外接圆
交
于点
,连结
.
![](https://img.xkw.com/dksih/QBM/2023/4/13/3215797963857920/3216844079513600/STEM/51b69be488fc4d50a427307d11bdb927.png?resizew=610)
(1)求证∶
.
(2)如图2,当
时,连结
,延长
交
于点
,求证
.
(3)如图3,在(2)的条件下,记
的交点为点
,连结
.
①求证∶
.
②当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2023/4/13/3215797963857920/3216844079513600/STEM/51b69be488fc4d50a427307d11bdb927.png?resizew=610)
(1)求证∶
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d15f55b38ef7444e5a755c0aac2bc38.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47ddc7c9fb41942160e3cafcf756776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ddde79da90bad8203c6070ede3de2fa.png)
(3)如图3,在(2)的条件下,记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e063f09f965c60f7d856caa082f2229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1630f75256bcfdcb62ffec9ee0d328bd.png)
①求证∶
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337645a0d46546ced388e0808d1957d7.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cdc988e5974c88453eed4fbf851265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2d1d38712bb4ed9f9b5ebcfb7e8d2c.png)
2023·浙江宁波·二模 查看更多[7]
2023年浙江省宁波市南三中考二模数学试题2023浙江省宁波市南三县中考数学一模试题江西省景德镇一中2022-2023学年八年级下学期期中数学试题(已下线)专题16 几何类压轴问题-学易金卷:2023年中考数学一模试题分项汇编(浙江专用)(已下线)2023年浙江省宁波市南三中考二模数学试题变式题21-24题2023年浙江省宁波市象山区一模数学试题2023年湖南省长沙市湖南师大附中梅溪湖中学中考三模数学试题
更新时间:2023-04-15 07:48:56
|
相似题推荐
【推荐1】如图,在直角坐标系中,直线
与
轴、
轴的交点分别为
、
,以
为对称轴的抛物线
与
轴分别交于点
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/0b51ff8c-ebf2-403d-9b89-29160043f59e.png?resizew=334)
(1)求抛物线的解析式;
(2)若点
是第二象限内抛物线上的动点,其横坐标为
.设抛物线的对称轴
与
轴交于点
,连接
,交
于
,求出当以
、
、
为顶点的三角形与
相似时点
的坐标;
(3)点
是对称轴上任意一点,在抛物线上是否存在点
,使以点
、
、
、
为顶点的四边形是平行四边形?若存在,请直接写出点
的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0cd46f83439cc8feb3ad3b2dd1c77e9.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/0b51ff8c-ebf2-403d-9b89-29160043f59e.png?resizew=334)
(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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)点
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】平行四边形
中,点E在
上方,
交
于点F,连接
交
于点G,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e7d6f02cc530a960a28e00ce2a8898.png)
(2)如图2,连接AE,若
求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5fc6ead6416492c231c320a5486f86.png)
(3)如图3,在(2)的条件下,过点E作
交
的延长线于点H,作
交
于点K.若
,
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25f8eb66299a0f6650c331d4f50d47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30f7e609b27a56d8b68f4d0bfc50759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e7d6f02cc530a960a28e00ce2a8898.png)
(2)如图2,连接AE,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701b71021fa4753304885b6e5e39b99d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5fc6ead6416492c231c320a5486f86.png)
(3)如图3,在(2)的条件下,过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812c74f78fb32ab99ac41f742f1fe2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3684b60071ad4fcf7631ad9803f4856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500da6c55f25483978465eb5e99ab8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a064c99f1def2a6adb2fc26e8e5b0272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-证明题
|
困难
(0.15)
解题方法
【推荐1】如图1,平面直角坐标系中,矩形OABC的顶点A、C分别在x轴正半轴与y轴正半轴上,顶点B坐标为(6,4),点D是BC边上的动点,连结OD,过点D作DE⊥OD交AB于E,以DE为直径作⊙M.连结OE交⊙M于点F,连结DF.
![](https://img.xkw.com/dksih/QBM/2022/6/8/2997037277298688/2999266075131904/STEM/6497dc78c581427a85b72d546170f4b5.png?resizew=409)
(1)求证:∠AOD=∠DEB;
(2)当点D位于BC中点时,求点E的坐标
(3)在点D的运动过程中,
①是否存在某一时刻,使得△BDF成为等腰三角形.若存在,求CD的长;若不存在说明理由.
②连结AM(如图2),当tan∠OEA=3时,恰有AM
DF,请直接写出tan∠COD的值.
![](https://img.xkw.com/dksih/QBM/2022/6/8/2997037277298688/2999266075131904/STEM/6497dc78c581427a85b72d546170f4b5.png?resizew=409)
(1)求证:∠AOD=∠DEB;
(2)当点D位于BC中点时,求点E的坐标
(3)在点D的运动过程中,
①是否存在某一时刻,使得△BDF成为等腰三角形.若存在,求CD的长;若不存在说明理由.
②连结AM(如图2),当tan∠OEA=3时,恰有AM
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
您最近一年使用:0次
【推荐2】已知顶点为A的抛物线
交y轴于点
,且与直线l交于不同的两点M、N(M、N不与点A重合).
(1)求抛物线的解析式;
(2)若
,
①试说明:直线l必过定点;
②过点A作
,垂足为点E,求点B到点E的最短距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e909a2cc854ac7eef5bc7fd3c7ff41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29610a3415c1e795d35979a5a9ff69f3.png)
(1)求抛物线的解析式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39cb59543ccf42b37ebce3f67416e561.png)
①试说明:直线l必过定点;
②过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e77a906a317863df81327e97ae0d5e4.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐3】如图1,抛物线C1:
与
轴交于点A(-1,0)、B(3,0),与y轴交点C(0,-3).
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640352069230592/2640377484460032/STEM/90c7ba82-e43d-48b0-a565-111963964c00.png?resizew=451)
(1)求抛物线C1的解析式;
(2)抛物线上是否存在一点P,使得∠APB=∠ACO成立?若存在,求出点P的坐标;若不存在,请说明理由;
(3)已知抛物线C1向右平移1个单位长度,再向上平移3个单位长度得到抛物线C2与
轴交于 A',B'两点(A'在B'左边),如图2,P'为抛物线C2上一动点(P'在A'左边)直线P'A' 、P'B'分别与直线
:y=-2交于C',D两点,A'M⊥
于M,B'N⊥
于N,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640352069230592/2640377484460032/STEM/90c7ba82-e43d-48b0-a565-111963964c00.png?resizew=451)
(1)求抛物线C1的解析式;
(2)抛物线上是否存在一点P,使得∠APB=∠ACO成立?若存在,求出点P的坐标;若不存在,请说明理由;
(3)已知抛物线C1向右平移1个单位长度,再向上平移3个单位长度得到抛物线C2与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d7afac1c63dff83828fa778bf8bc7a.png)
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解答题-计算题
|
困难
(0.15)
【推荐1】如图14-1,在锐角△ABC中,AB = 5,AC =
,∠ACB = 45°.
计算:求BC的长;
操作:将图14-1中的△ABC绕点B按逆时针方向旋转,得到△A1BC1.如图14-2,当点C1在线段CA的延长线上时.
(1)证明:A1C1⊥CC1;
(2)求四边形A1BCC1的面积;
![](https://img.xkw.com/dksih/QBM/2014/6/4/1573731398156288/1573731404201984/STEM/e0a06f8dfe2348419cf3573c1bed4615.png)
![](https://img.xkw.com/dksih/QBM/2014/6/4/1573731398156288/1573731404201984/STEM/3bceb1ac187c4094943b77d7bbb60d16.png)
![](https://img.xkw.com/dksih/QBM/2014/6/4/1573731398156288/1573731404201984/STEM/39099f9c579145adaf6db0d8c6ec2604.png)
![](https://img.xkw.com/dksih/QBM/2014/6/4/1573731398156288/1573731404201984/STEM/190fa43987b44ad08f540794600b9c94.png)
探究:
将图14-1中的△ABC绕点B按逆时针方向旋转,得到△A1BC1.连结AA1,CC1,如图14-3.若△ABA1的面积为5,求点C到BC1的距离;
拓展:
将图14-1中的△ABC绕点B按逆时针方向旋转,得到△A1BC1.点E为线段AB中点,点P是线段AC上的动点,在△ABC绕点B按逆时针方向旋转过程中,点P的对应点是点P1,如图14-4.
(1)若点P是线段AC的中点,求线段EP1长度的最大值与最小值;
(2)若点P是线段AC上的任一点,直接写出线段EP1长度的最大值与最小值.
![](https://img.xkw.com/dksih/QBM/2014/6/4/1573731398156288/1573731404201984/STEM/164b4663749740e9bb702fd64ccc64f9.png)
计算:求BC的长;
操作:将图14-1中的△ABC绕点B按逆时针方向旋转,得到△A1BC1.如图14-2,当点C1在线段CA的延长线上时.
(1)证明:A1C1⊥CC1;
(2)求四边形A1BCC1的面积;
![](https://img.xkw.com/dksih/QBM/2014/6/4/1573731398156288/1573731404201984/STEM/e0a06f8dfe2348419cf3573c1bed4615.png)
![](https://img.xkw.com/dksih/QBM/2014/6/4/1573731398156288/1573731404201984/STEM/3bceb1ac187c4094943b77d7bbb60d16.png)
![](https://img.xkw.com/dksih/QBM/2014/6/4/1573731398156288/1573731404201984/STEM/39099f9c579145adaf6db0d8c6ec2604.png)
![](https://img.xkw.com/dksih/QBM/2014/6/4/1573731398156288/1573731404201984/STEM/190fa43987b44ad08f540794600b9c94.png)
探究:
将图14-1中的△ABC绕点B按逆时针方向旋转,得到△A1BC1.连结AA1,CC1,如图14-3.若△ABA1的面积为5,求点C到BC1的距离;
拓展:
将图14-1中的△ABC绕点B按逆时针方向旋转,得到△A1BC1.点E为线段AB中点,点P是线段AC上的动点,在△ABC绕点B按逆时针方向旋转过程中,点P的对应点是点P1,如图14-4.
(1)若点P是线段AC的中点,求线段EP1长度的最大值与最小值;
(2)若点P是线段AC上的任一点,直接写出线段EP1长度的最大值与最小值.
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】综合与实践
问题情境:
在正方形
中,
,O是对角线
的中点,连接
,将
绕点C顺时针旋转一定角度
得到
,G是
的中点,连接
交
于点F,连接
交
于点H.
(1)如图1,P是
的中点,连接
,在旋转过程中,当点E在
的延长线上时,试猜想
与
的数量关系,并说明理由.
问题解决:
(2)如图2,当
经过点G时,连接
,此时恰好
,求线段
的长度.
(3)在旋转过程中,当A,
,E三点共线时,请直接写出
的面积.
问题情境:
在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335c1d4db7d83b1271c2d6ff87a24b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e6914a20eb17b6697abebb4625135f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943712a5e96b16cc15d775cc4687237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943712a5e96b16cc15d775cc4687237e.png)
(1)如图1,P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943712a5e96b16cc15d775cc4687237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943712a5e96b16cc15d775cc4687237e.png)
问题解决:
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82968e646c1349e7f40798bf44af698c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)在旋转过程中,当A,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
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【推荐3】如图,抛物线y=x2+bx+12(b<0)与x轴交于A,B两点(A点在B点左侧),且OB=3OA.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424452640768/2926818483396608/STEM/73f97aa9c89d443a982b575451beb01b.png?resizew=455)
(1)请直接写出b= ,A点的坐标是 ,B点的坐标是 ;
(2)如图(1),D点从原点出发,向y轴正方向运动,速度为2个单位长度/秒,直线BD交抛物线于点E,若BE=5DE,求D点运动时间;
(3)如图(2),F点是抛物线顶点,过点F作x轴平行线MN,点C是对称轴右侧的抛物线上的一定点,P点在直线MN上运动.若恰好存在3个P点使得△PAC为直角三角形,请求出C点坐标,并直接写出P点的坐标.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424452640768/2926818483396608/STEM/73f97aa9c89d443a982b575451beb01b.png?resizew=455)
(1)请直接写出b= ,A点的坐标是 ,B点的坐标是 ;
(2)如图(1),D点从原点出发,向y轴正方向运动,速度为2个单位长度/秒,直线BD交抛物线于点E,若BE=5DE,求D点运动时间;
(3)如图(2),F点是抛物线顶点,过点F作x轴平行线MN,点C是对称轴右侧的抛物线上的一定点,P点在直线MN上运动.若恰好存在3个P点使得△PAC为直角三角形,请求出C点坐标,并直接写出P点的坐标.
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困难
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名校
【推荐1】
是边长为5的等边三角形,
是边长为3的等边三角形,直线
与直线
交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/9e6551d9-60ff-4de7-8ccc-33ab84535e01.png?resizew=170)
(1)如图,若点D在
内,
,求
的度数;
(2)现将
绕点C旋转1周,在这个旋转过程中,
①
的度数是否改变?请说明理由;
②线段
长度的最大值是 ,最小值是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/9e6551d9-60ff-4de7-8ccc-33ab84535e01.png?resizew=170)
(1)如图,若点D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75e6dae9fd78e52ee1e3c875367c4ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac37366d2b54dc7d9a95ac6ddda5f3a8.png)
(2)现将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36719f1e764ee0e719b65c49fae84677.png)
②线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
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真题
名校
【推荐2】如图1,抛物线y=ax2+bx+3(a≠0)与x轴交于A(-3,0)和B(1,0),与y轴交于点C,顶点为D.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/19/15646183-1cf6-448a-8119-d97aa1204b14.jpg?resizew=332)
(1)求解抛物线解析式;
(2)连接AD,CD,BC,将△OBC沿着x轴以每秒1个单位长度的速度向左平移,得到
,点O、B、C的对应点分别为点
,
,
,设平移时间为t秒,当点O'与点A重合时停止移动.记
与四边形AOCD的重叠部分的面积为S,请直接写出S与时间t的函数解析式;
(3)如图2,过抛物线上任意一点M(m,n)向直线l:
作垂线,垂足为E,试问在该抛物线的对称轴上是否存在一点F,使得ME-MF=
?若存在,请求F点的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/19/15646183-1cf6-448a-8119-d97aa1204b14.jpg?resizew=332)
(1)求解抛物线解析式;
(2)连接AD,CD,BC,将△OBC沿着x轴以每秒1个单位长度的速度向左平移,得到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066b6d0b9b1e1000a0190fd5d661f01b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066b6d0b9b1e1000a0190fd5d661f01b.png)
(3)如图2,过抛物线上任意一点M(m,n)向直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e8b96444a4f1fe942df8e351c86b51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
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真题
【推荐3】如图,四边形ABCD中,
,∠ABC=90°,∠C=30°,AD=3,
,DH⊥BC于点H.将△PQM与该四边形按如图方式放在同一平面内,使点P与A重合,点B在PM上,其中∠Q=90°,∠QPM=30°,
.
(2)△PQM从图1的位置出发,先沿着BC方向向右平移(图2),当点P到达点D后立刻绕点D逆时针旋转(图3),当边PM旋转50°时停止.
①边PQ从平移开始,到绕点D旋转结束,求边PQ扫过的面积;
②如图2,点K在BH上,且
.若△PQM右移的速度为每秒1个单位长,绕点D旋转的速度为每秒5°,求点K在△PQM区域(含边界)内的时长;
③如图3.在△PQM旋转过程中,设PQ,PM分别交BC于点E,F,若BE=d,直接写出CF的长(用含d的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a547c8928c11f6211ff8028d11e7b0d.png)
(2)△PQM从图1的位置出发,先沿着BC方向向右平移(图2),当点P到达点D后立刻绕点D逆时针旋转(图3),当边PM旋转50°时停止.
①边PQ从平移开始,到绕点D旋转结束,求边PQ扫过的面积;
②如图2,点K在BH上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347f47a9015226a5da56ee8f65bf8f3b.png)
③如图3.在△PQM旋转过程中,设PQ,PM分别交BC于点E,F,若BE=d,直接写出CF的长(用含d的式子表示).
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