1 . 如图,在菱形
中,E为
上一点,
、
交于点O,若
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fefce64c3ecd0d57c3632951fd5e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb9800bb3088aebc9c14a015c40ec1d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/68d8191c-5428-4c9a-8791-468ad017f79c.png?resizew=185)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:福建省漳州市2022-2023学年九年级上学期期末数学试题(A卷)
2 . 如图,在
中,
,
是
的平分线,
是
上一点,以
为半径的
经过点
.
(1)用直尺和圆规确定圆心
的位置,并证明
是
切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241465bb8b380fc37d46763241c92e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146a63bac5ecd239f2696801e8eaa0b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/a430d814-8d7e-4070-a7fa-447140acbbcb.png?resizew=164)
(1)用直尺和圆规确定圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1e74dfe5bb72cc2ec11fed875824de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd880e197a74294650d90579563a7b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
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3 . 如图所示,在平面直角坐标系中,直线
与
轴,
轴分别交于
点、
点,点
从点
开始沿
边向终点
以1厘米/秒的速度移动;点
从点
开始沿
边向终点
以1厘米/秒的速度移动.若点
,
同时出发,运动时间为
秒
(1)当
时,
①
点的坐标___________;(用
来表示)
②当
为直角三角形时,求
的值;
(2)当
的面积为8平方厘米时,求
与
的数量关系,并求出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8046238bf6f1ad353baa82679a05501.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/8e74ffd3-5a4f-4b40-8999-5b8cf9da518c.png?resizew=183)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167bda06edd19e2be1fa65966b8cd070.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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名校
4 . 如图,D、E分别是
上的点,连接
,且
,若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f279d402050043751e941f3bd7aaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/102e836344156ea835d7d4e9b4120fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb388a36bd5caaa51b7e3c898e3c906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d00be47dcb89793f14a2fd10f4c522b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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6卷引用:福建省福州十六中2022-2023学年八年级下学期期末数学试题
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5 . 如图:
是
的直径,
是弦,过弧
的中点P作弦
,交
于D,交
于E,则下面关系不成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/5/1a88c267-bb40-445a-a07a-087312b0ed86.png?resizew=159)
A.![]() | B.![]() | C.![]() | D.![]() |
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5卷引用:福建省福州市平潭第一中学2022~2023学年九年级上学期期末数学试题
福建省福州市平潭第一中学2022~2023学年九年级上学期期末数学试题(已下线)专题04 圆的辅助线和辅助圆(九大题型)-【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(山东专用)(已下线)专题16 圆的基本性质(九种考法)-【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(北师大版)江苏省南通市通州区2023-2024学年九年级上学期期末数学试题江苏省南通市海安市初中教学联盟2023-2024学年九年级上学期12月月考数学试题
名校
6 . 在正方形网格中,A、B、C、D均为格点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/144756680a62547ec77b257867f205b8.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/144756680a62547ec77b257867f205b8.png)
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7 . 如图,已知在
中,
是
的中线,
,点
在边
上,
.
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1f8c020a6e3991537f7b634df041c0.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/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/28/a537b538-f644-4ecb-af67-7da04e177278.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc19873842520346e33749aab61276a.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b5bd0d000b569aabdf18ae24b0b443.png)
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8 . 如图,在矩形
中,
与
相交于点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/19/a06cdc50-f51b-46eb-a585-3fd7f0a0fe7f.jpg?resizew=164)
(1)求作
的平分线
,分别交
、
于点E、F;(要求:尺规作图,保留作图痕迹.不写作法)
(2)在(1)的条件下,若
,求证:
.
![](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://img.xkw.com/dksih/QBM/editorImg/2023/9/19/a06cdc50-f51b-46eb-a585-3fd7f0a0fe7f.jpg?resizew=164)
(1)求作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bc8e50eeccced1d7f3bc52e09a7d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076a5273440d800b96bfcaaa9970cc45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a956638898907c2ed398843d8401b0d9.png)
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2023-09-16更新
|
191次组卷
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4卷引用:福建省漳州市2022-2023学年九年级上学期期末数学试题(A卷)
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9 . 如图1,滹沱河是山西地区一条途经了舟山和太行山的知名河流,这条河流的流域面积达到了
万平方公里,其发源地处于山西省繁峙县泰戏山桥儿沟村,这条河流早在《山海经》中就有出现过,被叫做为虔池.为了估算河流的宽度,我们在河的对岸选定一个目标
,在近岸取点
和
,使点
、
、
共线且与河垂直,接着在过点
且与直线
垂直的直线上选择适当的点
,确定
与过点
且与
垂直的直线交点
.测得
,
,
,请根据这些数据求河的宽度
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e20b59b12788d0207aad352786175e.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/c5db41a1f31d6baee7c69990811edb9f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365822bd3945e6a3e871ca979c84cc12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8439982bd8266ded56f5076a03532e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03e599c51174d879d37601517d605d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34a165f441db0e5fb0b855f133bcc934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
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2023-09-15更新
|
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5卷引用:福建省福州市四校教学联盟2023-2024学年九年级上学期期末联考数学试题
福建省福州市四校教学联盟2023-2024学年九年级上学期期末联考数学试题2023年山西省晋中市部分学校中考模拟数学试题广东省深圳市南科大附属光明凤凰学校2023-2024学年九年级上学期月考数学试题(已下线)第05讲 相似三角形的性质及其应用(9类题型)-【帮课堂】2023-2024学年九年级数学上册同步学与练(浙教版)吉林省长春市长春汽车经济技术开发区第九中学2023-2024学年八年级下学期期中数学试题
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10 . 如图,抛物线
经过
,
两点,于
轴交于点
,
为第一象限抛物线上的动点,连接
,
,
,
,
与
相交于点
.
(2)设
的面积为
,
的面积为
,当
时,求点
的坐标;
(3)是否存在点
,使
,若存在,请求出点
的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e84f5c91c910aaafc5e74dbfbdf59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2f117dc9adcb8fa7acf25bd2cbf283.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92905d020164683947943040ec19c530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150b149381fa0a606b6bc7fd020500c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f5689de3ae17f4da29334da3a906e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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