真题
1 . 在梯形
中,
,点E在边
上,且
.
上,且
,联结
,求证:
;
(2)已知
;
①如图2所示,联结
,如果
外接圆的心恰好落在
的平分线上,求
的外接圆的半径长;
②如图3所示,如果点M在边
上,联结
、
、
,
与
交于N,如果
,且
,
,求边
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275d68d50a992cb17d948d3299012a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4460b19ce738055b0d3d27e6b1c5e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bbe1abbe2d935aa1a2fd91bd5b5019.png)
①如图2所示,联结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
②如图3所示,如果点M在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c603a3420f66fd45d58b29bdc468f90b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5007534690cc7836fdde91a5df1c10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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2024九年级下·江苏南通·专题练习
2 . 如图1,在平面直角坐标系中,抛物线
与x轴交于
两点,与y轴交于点C,
.
(2)求
外接圆半径;
(3)如图2,C与
的外心所在的直线交抛物线于点E,点P是抛物线上的一个动点(不与A、B、C重合),作直线
轴于点M,交直线
于点N,直线
交x轴于点H,连接
,是否存在点P,使
与
相似?若存在,直接写出点P的坐标:若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9b0fcaa6deb9bac941a4366c44f7ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8bcd8b83cdae463145481a40c97720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a23f35ebcd9799d82c1e41c09781a4c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)如图2,C与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72b886208c6c2df19b984f2631e1c996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40304b883f3d23bbf066bc0af3c09862.png)
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3 . 如图①,点D为
上方一动点,且
.
左侧构造
,连接
,请证明
;
(2)如图②,在
左侧构造
,在
右侧构造
,连接
求证:四边形
是平行四边形;
(3)如图③,当
满足
,
,
.运用(2)中的构造图形的方法画出四边形
;
(Ⅰ)求证:四边形
是矩形;
(Ⅱ)直接写出在点D运动过程中线段
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50cc6b559e9fa753a78cd6d08337b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327dc76741540e02fc19992549253bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5361da222575f656cec612922d0ec08c.png)
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327dc76741540e02fc19992549253bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581200dc0fd380ef38151a73a9e6372b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0684eaa9d424d04e9b78759016c393c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58646379ce2bc133b65913c6209266a5.png)
(3)如图③,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3adedf66719874af797224549c8cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e62aa9057264b2813c4f4324cf34b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58646379ce2bc133b65913c6209266a5.png)
(Ⅰ)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58646379ce2bc133b65913c6209266a5.png)
(Ⅱ)直接写出在点D运动过程中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
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4卷引用:2024年上海市中考数学真题变式题23-25题
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名校
4 . 如图,已知
在边长为1的小正方形的格点上,
的外接圆的一部分和
的边
组成的两个弓形(阴影部分)的面积和为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3355e2fa0ac6c675f02ee36c3ced4f2d.png)
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3卷引用:数学(山东青岛卷)-学易金卷:2024年中考考前押题密卷
5 . 如图,在平面直角坐标系中,已知
的三个顶点的坐标分别为
,
,
.
的外接圆的半径为_________.
(2)将
绕点
顺时针旋转
后得到
,请在图中画出
;
(3)在(2)的条件下,求出线段
扫过的区域图形的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7941eefc4e262e5144d8dfe74f58fc5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28c47f0cc43eaace61a1988d9b1be9b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b18bf8c9cb0542d3fefca36bf4f98e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7988923407b9abb78ef8ab45829678fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7988923407b9abb78ef8ab45829678fa.png)
(3)在(2)的条件下,求出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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3卷引用:专题08+圆的基本性质1(5大易错点分析)-备战2024年中考数学考试易错题(浙江专用)
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6 . 如图,
中,
,
,点
在射线
上运动,连接
交
外接圆于
,则
的最小值为 _____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd627d3016adf0bbb093fb85ceef603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0093ca481b718eff7034cda27a6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1165830b314a0dab65ea267e82bd3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b044e1fc58f1da29ddf2fa8413aa5f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/da18020d-592e-4fa4-9949-a7b042cfa397.jpg?resizew=212)
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7 . 如图,
是
的外角
的平分线,
外接圆的圆心O为
的中点,延长
交于点F.若
,
,则
的周长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f94482cfd3c193a16326bd12a7d0f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4267c178771ea6ddccecd9f9128d3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/13433c11-94db-4b8d-9efc-6fa2ad52d34c.png?resizew=248)
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2023九年级·全国·专题练习
名校
8 . 如图的方格纸中,每个方格的边长为1,A、
两点皆在格线的交点上,今在此方格纸格线的交点上另外找两点
、
,使得
的外心为
,则
的长度为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/0cf1718f-91cb-4146-b79d-5778efb5e9a2.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/0cf1718f-91cb-4146-b79d-5778efb5e9a2.png?resizew=179)
A.4 | B.5 | C.![]() | D.![]() |
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6卷引用:专题28圆的有关位置关系(优选真题60道)-学易金卷:三年(2021-2023)中考数学真题分项汇编【全国通用】
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名校
9 . 问题发现
(1)在
中,
,
,则
面积的最大值为 ;
(2)如图1,在四边形
中,
,
,
,求
的值.
问题解决
(3)有一个直径为
的圆形配件
,如图2所示.现需在该配件上切割出一个四边形孔洞
,要求
,
,并使切割出的四边形孔洞
的面积尽可能小.试问,是否存在符合要求的面积最小的四边形
?若存在,请求出四边形
面积的最小值及此时
的长;若不存在,请说明理由.
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4362edfc026266c5d29b3f90df374e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b107b118778650bdc523229900256418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5865949e0e19e9b9ca8bf0277eb27e13.png)
问题解决
(3)有一个直径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9871f2a312aaf3a19b40e4fb1a7693b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c094cb9afc9cdc1182c50a0242393aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a23f35ebcd9799d82c1e41c09781a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
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4卷引用:重难点05 圆的综合压轴题(6大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)
(已下线)重难点05 圆的综合压轴题(6大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)(已下线)抢分秘籍11 几何图形中求线段,线段和,面积等最值问题(4题型)-备战2024年中考数学抢分秘籍(全国通用)2024年陕西省西安高新第一中学中考一模数学试题2024年陕西省西安市雁塔区高新一中中考一模数学试题
10 . 若一直角三角形外接圆的半径为2.5,则这个直角三角形的斜边长为______ .
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