1 . 如图,在
中,点D、E、F分别在
,
,
边上,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/002a50aa-377f-4bd4-b3ab-b004d94784b7.png?resizew=194)
(1)求证:
;
(2)设
,若
,求线段
的长.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c197d8b99f2eb7477947e53461b5d548.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/002a50aa-377f-4bd4-b3ab-b004d94784b7.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2742689197bff3f9b28a093891f57c81.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aa674a0108d37a8fb29abbd3d95123f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
2 . 如图,
的顶点
在y轴上,
两点都在x轴上,将边
向右平移,平移后点
的对应点为D,点
的对应点为
,线段
交AC于点
,若
,则点
的坐标为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0691774b9d0d680944906fd6ac8f180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c97d73a687d728eb0b265d389c5d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43db4fad1a93083e03c628eee614d353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36a1938df65db2b68bf7595b97bafa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/d876afb4-08c6-4bf4-b0a0-538f9657d869.png?resizew=193)
您最近一年使用:0次
3 . 如图,在正方形
中,
,点
是
边的中点,连接
与
交于点
,点
为
的中点,点
为
上的动点.当
时,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/5eaaa4cb-3a5f-4027-b773-18bbccc720ec.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f976007b8d754ac3bf5793ed2fce37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2034076afc2cb4e3c4d25e90a0827906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef9d0784478511736255074b9395fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8156d824afbdef7ead0a52fafdef6997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/5eaaa4cb-3a5f-4027-b773-18bbccc720ec.png?resizew=150)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 数学活动课上,张老师引导同学们进行如下探究,如图1,将长为
的铅笔
斜靠在垂直于水平桌面
的直尺
的边沿上,一端A固定在桌面上,图2是示意图.活动一:如图3,将铅笔
绕端点A顺时针旋转,
与
交于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/43f32b00-acd6-4695-9e82-60b223a73eea.png?resizew=246)
(1)数学思考:若
垂直
,设
.
①
的长是______
(用含x的代数式表示),
的长是______
(用含y的代数式表示)
②求y与x的函数关系式.
(2)活动二:若(1)中的x,y满足
,根据(1)中求得的y与x的函数关系式,求x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689ff84e2d7f52c7446ef789a54557da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/43f32b00-acd6-4695-9e82-60b223a73eea.png?resizew=246)
(1)数学思考:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300939c07aa8b4cf92b8db94eb400fc0.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
②求y与x的函数关系式.
(2)活动二:若(1)中的x,y满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581f4963e80a21e9bb1dac9bb79263c4.png)
您最近一年使用:0次
5 . 如图,在
中,
,
,
.动点P从点B出发,在
边上以每秒
的速度向点A匀速运动,同时动点Q从点C出发, 在
边上以每秒
的速度向点B匀速运动,运动时间为t秒
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/44c63bd6-bc01-4f5c-afed-33980f753628.png?resizew=205)
(1)用含t的代数式表示
的长.
(2)连结
,如图①所示.当
与
相似时,求t的值.
(3)过点P作
于D,连结
,如图②所示.当
时,直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafddfd80f69337909f6eac0f0dbfd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a9eed64d225267a58cd001db67e2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c77f28566edddf4c3a8c15b3eee12a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/44c63bd6-bc01-4f5c-afed-33980f753628.png?resizew=205)
(1)用含t的代数式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9bfa71aeb949bbac110c17fff6b2549.png)
(2)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65334978b0519b379910dfc4acf8344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e2fb464db23db47817a91ba1764f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e36eaad3857bcaa452133b271c9cf56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
您最近一年使用:0次
6 . 如图,在正方形
中,点
是
边上一点(不与点
,
重合),且
,
交边
于点
.
(1)求证:
①
;
②
;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/f8aca29eb6c46838852134027cf28d99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/3027bcbe-584f-425d-8f4c-2eef82c6da8e.png?resizew=125)
(1)求证:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132560c0641bdc459eba186e7be12c63.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efca2c30aa2498332c8b505b8964e371.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ae354da16d48338d96d47e5f03bfe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810747482a970083c3166d6c29fe509f.png)
您最近一年使用:0次
2023-12-12更新
|
206次组卷
|
3卷引用:贵州省贵阳市清镇市鸭池河中学2023-2024学年九年级上学期11月月考数学试题
7 . 如图,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.
(1)求这条抛物线所对应的函数表达式.
(2)如图①,点D是x轴下方抛物线上的动点,且不与点C重合.设点D的横坐标为m,以O、A、C、D为顶点的四边形面积为S,求S与m之间的函数关系式.
(3)如图②,连结
,点M为线段
上一点,点N为线段
上一点,且
,直接写出当n为何值时
为等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b286a72a818ccc52e63581841da08dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6109d39796845c833c05c4708951d53a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26c41a2e61da63ceb7e1ed328fe9817c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/3db3d6fc-3466-4ac2-a251-790b6ea7f490.png?resizew=315)
(1)求这条抛物线所对应的函数表达式.
(2)如图①,点D是x轴下方抛物线上的动点,且不与点C重合.设点D的横坐标为m,以O、A、C、D为顶点的四边形面积为S,求S与m之间的函数关系式.
(3)如图②,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/d75aa638a01d7827a2e5c95955bfe3e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
您最近一年使用:0次
8 . 如图,
中,D是边
上的一点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/5edf14d8-4e5d-4c8d-a0d2-dab9de146548.png?resizew=165)
(1)在
上求作一点E,使
;(尺规作图,只保留作图痕迹,不要求写作法)
(2)求证:
.
![](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/6722c7eed268b1474c08e346375b90f6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/5edf14d8-4e5d-4c8d-a0d2-dab9de146548.png?resizew=165)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65ce4a35c5b83ce930344454ae39594.png)
您最近一年使用:0次
9 . 数学实践活动是一种非常有效的学习方式,通过活动可以激发学习兴趣,提高动手动脑能力,改进学习方法,提高学习效率.
(1)发现解决:将正方形纸片
折叠,使边
都落在对角线
上,
,如图①,则
= ;线段
之间的数量关系为 ;
(2)类比引申:如图②,在矩形
中,连接对角线
,四边形
是正方形,如果
=
,
则矩形
的面积是多少?
(3)拓展应用:如果图①中正方形纸片
的边长为
,沿
剪开,再进行折叠,
重合,折痕为
.点
上,
,如图③,则
的周长是多少?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/e4de0472-3bff-46bf-919b-07f5b0233144.png?resizew=368)
(1)发现解决:将正方形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c18645bedb8cdf66c41ca9b0bf705f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ad07b15b42f9d1198e649c548f7310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28c693f0e8f4027328d6b8863a516633.png)
(2)类比引申:如图②,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd2f9815e64be23eedb356c02ab60cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0cf182c8fc60865d49a92ba569512c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
(3)拓展应用:如果图①中正方形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8da10b2137a1e87801556a313e625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952e8498655be08ec7e6b614632a8a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94dfaab1e1675d33d91a8239f420842b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fdb8865ae357b7a16b6a30cf4a9e592.png)
您最近一年使用:0次
名校
10 . 背景:一次小组合作探究课上,小明将两个正方形按如图1所示的位置摆放(点E、A、D在同一条直线上),小组讨论后,提出了下列三个问题,请你帮助解答:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/318e55d4-f455-48db-9d82-f3ea81bfb7a0.png?resizew=465)
(1)如图2,将正方形
绕点A按逆时针方向旋转,求
与
的数量关系和位置关系;
(2)如图3,把背景中的正方形分别改写成矩形
和矩形
,且
,
,
,将矩形
绕点A按顺时针方向旋转,求
与
的数量关系和位置关系;
(3)在(2)的条件下,小组发现:在旋转过程中,
的值是定值,请求出这个定值.(直接写出答案)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/318e55d4-f455-48db-9d82-f3ea81bfb7a0.png?resizew=465)
(1)如图2,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(2)如图3,把背景中的正方形分别改写成矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9213da82fd4080bb3097671bdd2a28e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(3)在(2)的条件下,小组发现:在旋转过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd35e8ebeb27cf3a4128c0c59904e63.png)
您最近一年使用:0次
2023-12-05更新
|
71次组卷
|
12卷引用:贵州省贵阳市修文县2022-2023学年九年级上学期期末数学试题
贵州省贵阳市修文县2022-2023学年九年级上学期期末数学试题(已下线)专题27.19 相似三角形的性质(知识讲解)-2022-2023学年九年级数学下册基础知识专项讲练(人教版)(已下线)专题6.20 相似三角形的性质(知识讲解)-2022-2023学年九年级数学下册基础知识专项讲练(苏科版)河南省驻马店市正阳县2022-2023学年九年级上学期期末数学试题(已下线)专题4.53 相似三角形的性质与判定综合专题(分层练习)(综合练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)2021年河南师范大学附属中学中考名校内部摸底数学试题2021年河南省河南师范大学附属中学九年级下学期第二次模拟考试数学试题(已下线)数学-(河南卷)【试题猜想】2021年中考考前最后一卷2021年湖北省襄阳市襄州区中考数学适应性试题(已下线)专题4.24 相似三角形的性质(知识讲解)-2022-2023学年九年级数学上册基础知识专项讲练(北师大版)河南省开封市东北学区2021-2022学年九年级上学期期中数学试题福建省宁德蕉城校际联考2022-2023学年九年级上学期期中数学试题