如图,
、
为圆
的两条弦,直线
、
垂直于点
,连接
,直线
于点
,直线
交直线
于点
.
(1)如图1,求证:
平分
;
(2)如图2,若点
在圆
内部,连接
,求证:
;
(3)如图3,在(2)的条件下,延长
,交圆
于点
,连接
并延长,交
于点
,交圆
于点
,
与
交于点
,交
于点
,交
于点
,若
,
,
,求圆
的半径.
![](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/1dde8112e8eb968fd042418dd632759e.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/3/1b64cf23-a508-4a49-a5d7-6667f890a475.png?resizew=564)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edabae47b9b9df627aaa281ca0f4e71a.png)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3214c853ea2268ef6c434fb28f0298d.png)
(3)如图3,在(2)的条件下,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59faf75f0c95312e556ae905b3ff5b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd319b129adce519612311ec4a3d82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b0084ce01ae568eb2e402e281e69f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682c9d9b6ad1bc45ddbd6dd01060207b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32717e91ce7fc5afe1fb82480b98e0d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
21-22九年级上·黑龙江哈尔滨·期中 查看更多[2]
黑龙江省哈尔滨市松北区美加外国语学校初中部2021-2022学年九年级上学期期中数学(五四制)试题(已下线)(期中期末真题汇编)第24章 圆 (分层精练)-【题型分类精粹】2023-2024学年九年级数学上学期期中期末复习讲练系列【考点闯关】(人教版)
更新时间:2023-09-30 18:19:34
|
相似题推荐
解答题-应用题
|
困难
(0.15)
名校
【推荐1】如图,在平面直角坐标系中,点的坐标是
,点
的坐标是
,点
的坐标是
,其中
,点
和点
分别是
延长线和反向延长线上的点,
,
于点
,直线
交
轴于点
,直线
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/778015ea-4b99-4dff-9dcf-204248c4c4a5.png?resizew=213)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0d243249a3d9718f088943779d1c1d.png)
(2)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2674535993c07179054bbefa06a7828f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e600b154229240df733227e2ad89527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
您最近一年使用:0次
【推荐2】如图所示,
是一张放在平面直角坐标系中的纸片,点
与原点
重合,点
在
轴的正半轴上,点
在
轴的正半轴上.已知
,
.将纸片的直角部分翻折,使点
落在
边上,记为点
,
为折痕,点
在
轴上.
(1)在如图所示的直角坐标系中,点
的坐标为,________,
________;
(2)线段
上有一动点
(不与点
,
重合)自点
沿
方向以每秒
个单位长度向点
做匀速运动,设运动时间为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
,过点
作
交
于点
,过点
作
交
于点
,求四边形
的面积
与时间
之间的函数表达式.当
取何值时,
有最大值?最大值是多少?
(3)当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
为何值时,
,
,
三点构成一个等腰三角形?并求出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/bb2d3f02cb9007cd4a90ea30f6dd8181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9466d03bc916a9169eaf39863d59fceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/2020/4/23/2447706029588480/2447876933009408/STEM/0ee24d49f29a4b6992bb812b80a53e24.png?resizew=185)
(1)在如图所示的直角坐标系中,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66cee2447cc1b27fb88084268f4496c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7851b78fe4de8dca481eead1103e08b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/d685b2138e6499686474bb2d131a2234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb39b24911d417846948d2767130db70.png)
![](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)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66cee2447cc1b27fb88084268f4496c6.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐3】(1)【问题呈现】如图1,在正方形ABCD和正方形BEFG中,点A,B,E在同一条直线上,P是线段DF的中点,连接GP并延长交DC于点H,连接PC.探究PG与PC的PG位置关系及
的值(只写出结论,不需要证明).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/3141d66f-ba5c-4c1f-a16d-6892aa2c4843.png?resizew=463)
(2)【问题拓展】如图2,将问题(1)中的正方形ABCD和正方形BEFG换成菱形ABCD和菱形BEFG,且
,其他条件不变,探究PG与PC的位置关系及
的值,写出你的猜想并加以证明.
(3)【拓展延伸】如图3,将图2中的菱形BEFG绕点B顺时针旋转,使菱形BEFG在直线AB的下方,且边BG恰好与菱形ABCD的边AB在同一条直线上,问题(2)中的其他条件不变.你在(2)中得到的结论是否仍然成立?写出你的猜想并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3b1771fbc438ff888bd28bb1dadcee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/3141d66f-ba5c-4c1f-a16d-6892aa2c4843.png?resizew=463)
(2)【问题拓展】如图2,将问题(1)中的正方形ABCD和正方形BEFG换成菱形ABCD和菱形BEFG,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5f3f3ab861429d91093284373a3e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3b1771fbc438ff888bd28bb1dadcee.png)
(3)【拓展延伸】如图3,将图2中的菱形BEFG绕点B顺时针旋转,使菱形BEFG在直线AB的下方,且边BG恰好与菱形ABCD的边AB在同一条直线上,问题(2)中的其他条件不变.你在(2)中得到的结论是否仍然成立?写出你的猜想并加以证明.
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【推荐1】如图,在平面直角坐标系中,已知Rt△AOB的两直角边OA、OB分别在x轴和y轴的正半轴上,A(8,0),B(0,6),点C从原点O出发,沿边OA向点A运动,速度为每秒1个单位长度,点D从点A出发,沿边AB向点B运动,速度为每秒2个单位长度.设两点同时出发,运动时间为t秒(0 < t < 5)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/9b12a3d1-10bd-446b-8398-2cb86527f334.png?resizew=534)
(1)当t= 时,DC
BO;
(2)当△ADC的面积为9时,求t的值;
(3)在(2)的条件下;
①作射线BC,若M是射线BC上的一个动点,在坐标平面内是否存在点P,使以A、B、M、P为顶点的四边形是矩形?若存在,请直接写出点P的坐标;若不存在,请说明理由.
② 过点C作直线
⊥x轴,过点B作直线
⊥y轴,直线
与直线
交于点P,反比例函数
(k>0,x>0)的图像与直线
、
分别交于点E、F,连接EF,在y轴上是否存在点Q,使得△PEF和△QEF全等,若存在,请直接写出相应的k的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/9b12a3d1-10bd-446b-8398-2cb86527f334.png?resizew=534)
(1)当t= 时,DC
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
(2)当△ADC的面积为9时,求t的值;
(3)在(2)的条件下;
①作射线BC,若M是射线BC上的一个动点,在坐标平面内是否存在点P,使以A、B、M、P为顶点的四边形是矩形?若存在,请直接写出点P的坐标;若不存在,请说明理由.
② 过点C作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
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【推荐2】如图1,在平面直角坐标系中,直线
与
轴交于点
,与双曲线
交于
两点,其中点
的坐标为
.
(1)如图1,过点
作
轴的垂线,垂足为点
,求
的面积;
(2)如图2,点
为双曲线上一点,且点
的横坐标为3,直线
垂直
轴于点
.线段
为直线
上一动线段(点
在点
的下方),且长度为1,连接
,
,
,当线段
在直线
上运动时,求四边形
周长的最小值及此时点
的坐标;
(3)如图3,在(2)的条件下,动点
在直线
上,在平面直角坐标系中是否存在点
,使以点
为顶点的四边形是矩形,若存在,请直接写出点
的横坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe3c28a3c6ac8b0a7a9f60b04c232cf.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/b5c5dbbd1a7f9932567099ee67f2443f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5511a368692de27c58ec48ce968de4a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/9/3a95acc0-6f64-4711-87df-b8309166e728.png?resizew=349)
(1)如图1,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc29330979e64e99678423e58759779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f21b6823f15f2bc89016b0de041bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc29330979e64e99678423e58759779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ae2012a3351b52a7dfb226f1caa07a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(3)如图3,在(2)的条件下,动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe3c28a3c6ac8b0a7a9f60b04c232cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d446ec3c5580f552ae869c4f070e9198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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解答题-证明题
|
困难
(0.15)
名校
【推荐1】在
中,弦
和弦
交于点E,且
,连接
,
(1)如图1,求证:
平分
;
(2)如图2,点W在弧
上,连接
和
,若
,
,求
;
(3)在(2)的条件下,如图3,连接
,延长
交
于P,若
,
,求
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/268b846f-e256-4dec-bfb6-c0d3af6102dd.png?resizew=429)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
(2)如图2,点W在弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ffe6b49c6f6b5db12508df95456f1b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c7593598368789d9cb89d71edd5af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eeddcb3f82c0775013ab68762486614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50cee0b637b00edf0d785f345bb2f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1975f66fddb6a21fad599a55f17662ab.png)
(3)在(2)的条件下,如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f4432f01460e355172a3626486c65a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f4432f01460e355172a3626486c65a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21840c6b67cfad0994d8f91364d5fe9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6304efe009620cfcefed20acddefdef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
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解答题-问答题
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困难
(0.15)
名校
【推荐2】如图,四边形ABCD内接于⊙O,AC为直径,AC和BD交于点E,AB=BC.
(1)求∠ADB的度数;
(2)过B作AD的平行线,交AC于F,试判断线段EA,CF,EF之间满足的等量关系,并说明理由;
(3)在(2)条件下过E,F分别作AB,BC的垂线,垂足分别为G,H,连接GH,交BO于M,若AG=3,S四边形AGMO:S四边形CHMO=8:9,求⊙O的半径.
(1)求∠ADB的度数;
(2)过B作AD的平行线,交AC于F,试判断线段EA,CF,EF之间满足的等量关系,并说明理由;
(3)在(2)条件下过E,F分别作AB,BC的垂线,垂足分别为G,H,连接GH,交BO于M,若AG=3,S四边形AGMO:S四边形CHMO=8:9,求⊙O的半径.
![](https://img.xkw.com/dksih/QBM/2020/6/3/2476563434315776/2477433113575424/STEM/4fcc617550764e04a6fb78db82e8c989.png?resizew=374)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐3】在数学探究课上,老师组织了一个操作探究活动,如图1,在
中,已知
,
,将一把含
角的三角尺
紧贴在纸面上,并保持顶点E在
的边
上移动,且一边
过
的顶点A,
,边
与
交于点H.
(1)初步尝试:当
时,求
和
的长;
(2)探究运用:当
为等腰三角形时,求
的长;
(3)拓展延伸:如图2,作
的外接圆,圆心为点P.
①当点E运动到某一时刻,点P恰好落在线段
上,求此时
的长;
②M为线段
上一点,
,当点E从①中的点E位置运动到点M的过程中,点P也随之运动,请直接写出点P运动路径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeb0c8df3d8c5260768c5e407b3583a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e73a753b382c4cd84e15bd82bcbda1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/1a815aa7-5199-43ae-a218-6b7dc064e172.png?resizew=330)
(1)初步尝试:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9fd76d8997e3b2db7d9cb9b72d0f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
(2)探究运用:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded15467b6a0d3b56fd1cdf5a41a5122.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)拓展延伸:如图2,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded15467b6a0d3b56fd1cdf5a41a5122.png)
①当点E运动到某一时刻,点P恰好落在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
②M为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea85f90aace8404f08b10e41499b88f0.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐1】已知,
内接于
,弦
交
于点
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/803ecef8-6e9a-46a0-9128-b52a6ca82451.png?resizew=502)
(1)如图1,求证:
;
(2)如图2,连接
,
,过点
作
交
于点
,若
,求证:点
是
的中点.
(3)如图3,在(2)的条件下,点
在
上,
,过点
作
于点
,交
于点
,若
,
,求线段
的长.
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64bb60aa0f3a3d4ec8e51cf5770b191.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/803ecef8-6e9a-46a0-9128-b52a6ca82451.png?resizew=502)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ded7d74f38454e637dd09c8db83d085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)如图3,在(2)的条件下,点
![](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/a13458f8259fd95e92dad787e91571a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf193ff4546dfb09008d6354f374b280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f48ae91c35d9f808a4fe2eedab59a52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e89bd09073f85fab07ccf0560f3478b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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【推荐2】已知点P为∠MAN边AM上一动点,⊙P切AN于点C,与AM交于点D(点D在点P的右侧),作DF⊥AN于F,交⊙O于点E.
(1)连接PE,求证:PC平分∠APE;
(2)若DE=2EF,求∠A的度数;
(3)点B为射线AN上一点,且AB=8,射线BD交⊙P于点Q,sin∠A=
.在P点运动过程中,是否存在某个位置,使得△DQE为等腰三角形?若存在,求出此时AP的长;若不存在,请说明理由.
(1)连接PE,求证:PC平分∠APE;
(2)若DE=2EF,求∠A的度数;
(3)点B为射线AN上一点,且AB=8,射线BD交⊙P于点Q,sin∠A=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/2020/3/18/2425335254941696/2435728501252096/STEM/32cd4cfecbc04295880d86a6311d4fff.png?resizew=221)
您最近一年使用:0次