1 . 如图,在
的正方形网格中,每个小正方形的边长均为
,点
和点
在格点上,
是格点三角形(顶点在网格线交点上).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/c56d71f9-6047-4198-a7f7-30d972304d16.png?resizew=180)
(1)画出
以点
为位似中心的位似图形
,点
的对应点分别为点
、
和
;
(2)
与
的周长之比为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23f3b42cd6069f0e461035e76459ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/c56d71f9-6047-4198-a7f7-30d972304d16.png?resizew=180)
(1)画出
![](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/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2 . 如图,在
中,点D,E分别在边
上,若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a132433c8b42e5b23dd7af5ec2d59e0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0189bd10ca1151db4cbc7f02d05beb11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/76d50b28-653b-41b7-b5d0-8b2d55f63681.png?resizew=140)
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3 . 如图,
与
是位似图形,位似中心为
,
,下列结论正确的有( )
①
与
的相似比为
;②
;③
;④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54612ce1ac516cd0fbcf76a835a190ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/2273655e-120c-4654-bb07-e41a809db9ad.jpg?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12319db13cdb43fce7833b0079661b44.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752bdb03ab71f5d8d8cfc37c869cee38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a7a0bd98bfede28f5e13cb20b59e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54612ce1ac516cd0fbcf76a835a190ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/2273655e-120c-4654-bb07-e41a809db9ad.jpg?resizew=164)
A.1个 | B.2个 | C.3个 | D.4个 |
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2023-12-08更新
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4卷引用:陕西省渭南市大荔县2023-2024学年九年级上学期期末数学试题
4 . 如图,
与
位似,点
是它们的位似中心,且相似比为
,则下列结论正确的有( )
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03868f74ce37b35fd729418b74a6907d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ccc6c17c29b1195169f76aca07873f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947e3a6fd28e5009e651a8a6ef971afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734d7ae205fcb7a8c2d2e77d5c2a2d8c.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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2023-11-27更新
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3卷引用:2024年陕西省渭南市大荔县九年级中考一模数学试题
5 . 如图,平行四边形
中,
为
上一点,
交
于点
.已知
则下列判断错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c361c243ef1f997a87dde943671497d.png)
A.![]() ![]() ![]() |
B.![]() ![]() ![]() |
C.若连接![]() ![]() ![]() ![]() |
D.若题中条件“![]() ![]() ![]() ![]() ![]() |
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2023-11-18更新
|
81次组卷
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2卷引用:陕西省渭南市临渭区2023-2024学年九年级上学期期末数学试题
6 . 已知两个相似三角形的面积之比为
,这两个三角形的周长的和是
,那么较小的三角形的周长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef13f20d67caba2f5e6fdc9a4684387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e651babde701d43faadf589dd4e14c72.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 四边形的一条对角线把这个四边形分成两个三角形,如果这两个三角形相似(不全等),我们就把这条对角线称为这个四边形的“理想对角线”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/a8982cb0-5bc2-42af-891a-9ef9a6479a56.png?resizew=185)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/2b483c44-097f-4496-accf-5716e33e58f0.png?resizew=163)
(1)如图1,在四边形
中,
,
,
,当
时.求证:对角线
是四边形
的“理想对角线”;
(2)如图2,四边形
中,
平分
,
,
,对角线
是四边形
的“理想对角线”,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/a8982cb0-5bc2-42af-891a-9ef9a6479a56.png?resizew=185)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/2b483c44-097f-4496-accf-5716e33e58f0.png?resizew=163)
(1)如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec69d43f611d65d9b0dc642a83f12ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646c045c125b75aee53cecf4b28f3b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)如图2,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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2022-08-18更新
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4卷引用:陕西省渭南市蒲城县2021-2022学年九年级上学期期末数学试题
陕西省渭南市蒲城县2021-2022学年九年级上学期期末数学试题陕西省渭南市蒲城县2021-2022学年九年级上学期期中考试数学试卷安徽省六安市汇文中学2022-2023学年九年级上学期期中数学试题(已下线)专题16相似三角形的性质(3个知识点4种题型1个中考考点)-【帮课堂】2023-2024学年九年级数学上册同步学与练(北师大版)
8 . 若
,
与
的面积比为
,则
与
的对应边的比是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61291dca712701e08ff421ef334b371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c6f40eb622ebd12648aa5477d397bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 若
,
与
的面积比为
,则
与
的对应边的比是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61291dca712701e08ff421ef334b371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c6f40eb622ebd12648aa5477d397bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-08-05更新
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3卷引用:陕西省渭南市富平县2021-2022学年九年级上学期11月月考数学试题
名校
10 . 如图,在△ABC,D,E分别是AB,AC上的点,△ADE∽△ACB,相似比为AD:AC=2:3,△ABC的角平分线AF交DE于点G,交BC于点F,求AG与GF的比.
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2022-06-23更新
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312次组卷
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13卷引用:陕西省渭南市大荔县2021-2022学年九年级上学期期末数学试题
陕西省渭南市大荔县2021-2022学年九年级上学期期末数学试题陕西省渭南市蒲城县2022-2023学年九年级上学期期末数学试题沪科版2020-2021学年九年级上册同步22.3.1 相似三角形的性质(一)安徽合肥蜀山五十中分校2020-2021学年九年级上学期第二次月考数学试题四川省达州市渠县2020-2021学年九年级上学期期末数学试题(已下线)第13讲 相似三角形的性质与图形的位似-【暑假自学课】2022年新九年级数学暑假精品课(北师大版)(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)浙江省绍兴市新昌县南瑞实验学校2022-2023学年九年级上学期期中数学试题(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)(已下线)专题16相似三角形的性质(3个知识点4种题型1个中考考点)-【帮课堂】2023-2024学年九年级数学上册同步学与练(北师大版)(已下线)江苏省泰州市姜堰区南苑学校2023-2024学年九年级上学期数学数学独立作业12月(已下线)专题12 相似三角形(4大易错点分析)-备战2024年中考数学考试易错题(浙江专用)