2024七年级下·江苏·专题练习
1 . 如图,已知点
是射线
上一点,过
作
交射线
于点
,
交射线
于点
,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e1e803e0130cd7a3967eff90f11ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5232ca3c1e0ce4064d0094502aacb063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
A.![]() ![]() | B.图中互余的角共有![]() |
C.![]() ![]() | D.图中与![]() ![]() |
您最近一年使用:0次
名校
2 . 将直尺和直角三角板如图放置,已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc3ef6a72ecee9efdca1f447fa243d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
您最近一年使用:0次
2024-05-01更新
|
158次组卷
|
2卷引用:2024年江苏省扬州市邗江区中考一模数学模拟试题
3 . 【定义】如果两个角的差为
,就称这两个角互为“黄金角”,其中一个角叫做另一个角的“黄金角”.
例如:
,则
和
互为“黄金角”,即
是
的“黄金角”,
也是
的“黄金角”.
和
互为“黄金角”,且
,若
和
互余,则
_____;
(2)如图1所示,在
中,
,过点
作
的平行线
的平分线
分别交
于
两点.
①若
,且
和
互为“黄金角”,则
______;
②如图2所示,过点
作
的垂线,垂足为
相交于点
.若
与
互为“黄金角”,求
的度数;
③如图3所示,
的平分线
交
于点
,当
和
互为“黄金角”时,则
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b398c95494eddc79939f16e66cf4da.png)
例如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f159be12f25e95142e1f65b20e95e100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb109f318275794edf8e8e9f88c1e38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494ba20b1444f524cf636961e4688ae8.png)
(2)如图1所示,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac9e7e8bc5cd937c81eced23ab8210b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26adc2de5c9b253cba9111570219d367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7379da2d532c4ecc1328fce844fdacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6282292819434a8905a212427613fd85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
②如图2所示,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d778915bccce76452592caa5ca080eb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceac506180a5898c68ce48c53db73eaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9444b698d7c072a1bc3d46485cb2f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
③如图3所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e520cef3cebf757a24737ffb661834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae55a0c2394db34861f116b0a6d3b0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
您最近一年使用:0次
4 . 如果,
的余角=
的补角=
您最近一年使用:0次
5 . 综合实践课上,同学们动手折叠一张正方形纸片,如图,点M是边
的中点,点P、Q是
边上的两个动点,连接
,将
折叠,使点A 落在线段
上的点
处,
是折痕,将
折叠,使点B落在线段
上的点
处,
是折痕.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/112ba240-ec3e-4d79-8ed2-8aa96824d3f6.png?resizew=456)
(1)如图1,当点P与点Q重合时.
①线 段
与 线 段
的位置关系是_______;
②找出
的一个补角,并说明理由;
(2)如图2,当点P在点Q的左侧时,
,求出
的度数;
(3)若
,直接写出
的度数(用含α的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db0c0f83f454ed0b6baa451f60ce138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6500fbe1ea4a372d703502699b809e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2b7f63f07b00047cbb272fb1f77f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/112ba240-ec3e-4d79-8ed2-8aa96824d3f6.png?resizew=456)
(1)如图1,当点P与点Q重合时.
①线 段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
②找出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b7065c371396f3116003aef86caf09.png)
(2)如图2,当点P在点Q的左侧时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620b0823a19119334640f047bed68b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b89403a4db68423b83136d2cbff6225.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438ebf719421e8d2187ac41d5d546984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b89403a4db68423b83136d2cbff6225.png)
您最近一年使用:0次
6 . 课上,老师提出问题:如图,直线
相交于点
是
的角平分线,
,求
的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/fc09d8f4-d05e-483e-b1aa-bff0a31d69e6.png?resizew=206)
下面是小红根据老师的要求进行的分析及解答过程,请你补全解答过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92235858be79a02bf7304aa3b29283c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903ffbcb91610baa91379ec33736df68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86eac7fe9124895ce39629825262755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/fc09d8f4-d05e-483e-b1aa-bff0a31d69e6.png?resizew=206)
下面是小红根据老师的要求进行的分析及解答过程,请你补全解答过程.
思路方法 | 解答过程 | 知识要素 |
未知角 ![]() 已知角 | 因为![]() 所以 ![]() 因为 ![]() 所以 ![]() 又因为 ![]() ![]() 所以 ![]() 因为 ![]() 所以 ![]() 则 ![]() | 垂直的定义 角平分线的定义 互为余角的定义 对顶角的性质 |
您最近一年使用:0次
7 . 已知,点
为直线
上一点,过点
作射线
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/753fe605-c9e2-4923-965f-626f5961abcb.png?resizew=427)
(1)如图1,则
的度数为
;
(2)如图2,过点
在直线
下方作射线
,使
,作
的角平分线
,求
的度数;
(3)在(2)的条件下,作射线
,若
与
互余,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbb6a70dd29662017ca458e43b7dd777.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/753fe605-c9e2-4923-965f-626f5961abcb.png?resizew=427)
(1)如图1,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d29a7afeb0985db83d62d044fa5660b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9425d02202600fd4b0bbbc7cc5ac54f6.png)
(3)在(2)的条件下,作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd5cfc1134a08462e38256529685b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92f279be7c8a11dcd2c0a97116bdcbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f5dc1d043a4909a40238ff5b590c77.png)
您最近一年使用:0次
8 . 如图,
,则图中
,
,
三个角的数量关系为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/96b8e625-edea-4b2d-a72a-e5e405f356e5.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff9a78e77bc3e83b0d4c0085c3e1c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605f2976297a0deaa1602ef09d6a5afa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/96b8e625-edea-4b2d-a72a-e5e405f356e5.png?resizew=174)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
9 . 若
的余角是
,则
的补角为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d3e26ac45ef15ad8a2e91f01cb565e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
您最近一年使用:0次
2024-03-01更新
|
43次组卷
|
2卷引用:江苏省无锡市梁溪区2023-2024学年七年级上学期期末数学试题
10 . 定义:从
(
)的顶点出发,在角的内部作一条射线,若该射线将
分得的两个角中有一个角与
互为补角,则称该射线为
的“好线”.如图,点
在直线
上,
在直线
上方,且
,射线
是
的“好线”;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/8994e1c6-474c-476f-9d87-9128dcc9790b.jpg?resizew=176)
(1)若
,且
在
内部,则
;
(2)若
恰好平分
,请求出
的度数;
(3)若
是
的平分线,
是
的平分线,请画出图形,探究
与
的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b5ea2fc43b19ca043581eb94197234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdae1b1c950c86fa1db228b73bffc49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49bdf1dcfe6c344dd2442669e72c44b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/8994e1c6-474c-476f-9d87-9128dcc9790b.jpg?resizew=176)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1c9411cddf08daa1b6360324b03450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1f08bd1651f93a4303cf3a3b822391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2557547eecdc826b8282058802d217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb60036876b3c5aa09bb9570e57328b.png)
您最近一年使用:0次