2024九年级下·浙江·专题练习
1 . 如图,在
纸片中,
,将该纸片沿虚线剪开,剪下的阴影三角形与原三角形不相似的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e317708d2098d62bb9d0af844a2466.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 嘉淇做数学探究实验,如图,已知:
均为直角三角形,其中
,现以
为边作四边形
,且
,
,点
在一条直线上.
第一步,如图1,将
的顶点
与点
重合,
在
上;
第二步,如图2,将
绕点
逆时针方向旋转,每秒旋转
分别与
边交于点
;
第三步,如图3,当
旋转到点
落在
上时停止旋转,此时点
恰好在
上;
第四步,如图4,在第三步的基础上,点
带动
立即沿边
从点
向点
平移,每秒
个单位长度,当点
与点
重合时停止运动,设整个过程中
的运动时间为ts.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/f78c3d94-f7d2-4bfb-abd0-f96aac9b2060.png?resizew=646)
(1)如图1,①
______
;②点
到直线
的距离是______;
(2)如图2,求证
;
(3)如图3,当
从初始位置到点
落在
上时,求
的长度;
(4)当点
落在四边形
的边上时,直接 写出对应
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a6f7cf8d450266efe2b62d5d46d190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b65ac58ef6c81477975094875b9da4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518e0f9afe701015dce4b359705c59f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38ee972ede6a53f3213d2a750ae015d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28855a0db693584aabac1df99dfade3d.png)
第一步,如图1,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
第二步,如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5d76166192933cf9d3951af4984ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
第三步,如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
第四步,如图4,在第三步的基础上,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/f78c3d94-f7d2-4bfb-abd0-f96aac9b2060.png?resizew=646)
(1)如图1,①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)如图2,求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cb3952fc5997981197be3e1ebba1fb7.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(4)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2024九年级下·江苏·专题练习
3 . 如图,点D为
边
上一点
.求证:
.
![](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/2a78c96b293513f0aeaf809e380cab96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/959c452e3ec0f9f7d2c8146bcec35246.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/3feb9edb-6aa4-4f7e-adf1-93dec9bcb03c.png?resizew=224)
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2024九年级下·江苏·专题练习
4 . 如图,
中
,点D、E分别在
的边
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/d39041ad-6518-4d4c-9bb0-a23d816d2777.png?resizew=127)
(1)求证:
.
(2)如果
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795c8434116bd34166df16949f436480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae1210a744ae636419de68a525faf28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b64d9d2b7e21497153310e653f89704.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/d39041ad-6518-4d4c-9bb0-a23d816d2777.png?resizew=127)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317e552047126dddc8c99c526ddc20fa.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c8e51967a9ea55ecbc2a5779bc650c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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2022九年级上·全国·专题练习
5 . 已知:如图,在
中,
,
,D、E分别在
、
上,
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8832c5450a61500ccbf73d95e16f449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10e920866721a989bfea0f1c3e704d0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/ff62a43e-ae53-4213-88fe-a07bd5c8f592.jpg?resizew=149)
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名校
6 . 如图,在正方形网格中,点A、B、C都在格点上,(要求仅用无刻度的直尺,不要求写画法,保留必要的作图痕迹)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/0226a3fb-cbd9-4c87-a748-a09038373fc7.png?resizew=363)
(1)在图1中,以C为位似中心,位似比为
;请画出放大后的
.
(2)在图2中,线段
上作点M,利用格点作图使得
.
(3)在图3中,利用格点在
边上作-个点D,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/0226a3fb-cbd9-4c87-a748-a09038373fc7.png?resizew=363)
(1)在图1中,以C为位似中心,位似比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)在图2中,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3919b305d29ee107cee963a6c75aac.png)
(3)在图3中,利用格点在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ee8c0f94483e7502d8b7b97c43e2e8.png)
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2024-01-27更新
|
48次组卷
|
10卷引用:第07讲 图形的位似(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)
(已下线)第07讲 图形的位似(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)(已下线)专题04 图形的位似(四大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(人教版)(已下线)第04讲 图形的位似(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学下册《知识解读·题型专练》(苏科版)广东省深圳市南山区2022-2023学年九年级上学期期末考试数学试卷广东省深圳市深圳实验学校初中部2023-2024学年九年级上学期月考数学试题广东省深圳市南山外国语学校(集团)高新中学2023-2024学年九年级上学期期中模拟数学试题广东省深圳市四校2023-2024学年九年级上学期期中联考数学试题(已下线)期末模拟测试卷02-2023-2024学年九年级数学上学期期末考点大串讲(北师大版)江苏省扬州市江都区江都区第三中学2023-2024学年九年级上学期10月月考数学试题河南省驻马店市驿城区第四中学2023-2024学年九年级上学期1月月考数学试题
7 . 如图,在
中,
为
边上一点,
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/a5fbc5f7-44d0-4caf-b83b-5df7a64de63e.png?resizew=191)
(1)求证:
;
(2)若
,求对角线
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/a5fbc5f7-44d0-4caf-b83b-5df7a64de63e.png?resizew=191)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7cead823100009071dca3e1ef19f9b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d91f7621532f15a8bf235f3cb78639d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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8 . 如图,将
绕点B顺时针旋转,使得点A落在边
上,点A、C的对应点分别为D、E,边
交
于点F,连接
.下列两个三角形不一定相似的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/1a6fa9d1-38f8-4f93-8225-42ae6008c149.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/1a6fa9d1-38f8-4f93-8225-42ae6008c149.png?resizew=163)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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9 . 如图,在正方形网格中,
、
、
、
、
、
都是格点,从
、
、
、
四个格点中选取三个构成一个与
相似的三角形,某同学得到两个三角形:
;
.关于这两个三角形,下列判断正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/1514c582-c432-40d7-9785-763e8fffcc86.png?resizew=143)
![](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/c5db41a1f31d6baee7c69990811edb9f.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5104702c84b76be80c4a4a4cb1e2fd68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c065eb06891d18f014c272d8add671c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/1514c582-c432-40d7-9785-763e8fffcc86.png?resizew=143)
A.只有![]() | B.只有![]() | C.![]() ![]() | D.![]() ![]() |
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10 . 下列命题中,说法正确的是( )
A.如果一个直角三角形中有两边之比为![]() |
B.如果一个等腰三角形中有两边之比为![]() |
C.如果一个直角三角形中有两个内角的度数之比为![]() |
D.如果一个等腰三角形中有两个内角的度数之比为![]() |
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