1 . 如图,在
中,点D在
边上,
,将线段
绕点A逆时针旋转到
的位置,使得
,连接
,交
于点F.
;
(2)若
,求
的度数.
![](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/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59f9a4fe996045c2e1adb8caa06c1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5adc18ca424552b35ab939e9d57943e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3005d7d7de6f71f44a33b92ad5a9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
您最近一年使用:0次
2024-02-08更新
|
81次组卷
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3卷引用:广西壮族自治区南宁市2023-2024学年九年级上学期期末数学试题
2 . 综合与探究.
【问题情境】
数学活动课上,老师带领同学们一起探索旋转的奥秘.老师出示了一个问题:如图1所示,在
中,
,
,点
是边
上一点(
),连接
,将
绕着点
按逆时针方向旋转,使
与
重合,得到
.
(1)连接
,试判断
的形状,并说明理由;
【深入探究】
(2)希望小组受此启发,如图2,在线段
上取一点
,连接
,使得
,连接
,发现
和
有一定的关系,猜想两者的数量关系,并说明理由;
(3)智慧小组在图2的基础上继续探究,发现
,
,
三条线段之间也有一定的数量关系,请写出它们的数量关系,并说明理由.
【问题情境】
数学活动课上,老师带领同学们一起探索旋转的奥秘.老师出示了一个问题:如图1所示,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5983d6ca5eaf37b81efd49a517d8380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
【深入探究】
(2)希望小组受此启发,如图2,在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1abf808637d3acbaabf6e5896c6631ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(3)智慧小组在图2的基础上继续探究,发现
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/f9d3bd1e-1d45-4748-aa73-f25d23e0c5f5.png?resizew=240)
您最近一年使用:0次
2023九年级上·全国·专题练习
3 . 如图,在
中,点E在
边上,
,将线段
绕A点旋转到
的位置,使得
,连接
,
与
交于点G.
;
(2)若
,求
的度数.
![](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/be5fc6ead6416492c231c320a5486f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2b3d993a79210952ef190542700111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da8fe8f5f8a3f17561d70652ad1172a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0e6403059d0a1bc74e66aa463c44f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec88884321733714de9db5466629ccf2.png)
您最近一年使用:0次
2024-01-28更新
|
69次组卷
|
15卷引用:广西南宁市兴宁区第二中学2023-2024学年九年级上学期10月月考数学试题
广西南宁市兴宁区第二中学2023-2024学年九年级上学期10月月考数学试题2024年广西壮族自治区南宁市银海三雅学校九年级评价(三) 数学试题(已下线)第01讲 图形的旋转-【帮课堂】2023-2024学年九年级数学上册同步学与练(人教版)(已下线)专题01 与旋转有关的计算(30题)-【帮课堂】2023-2024学年九年级数学上册同步学与练(人教版)(已下线)专题03 旋转(知识串讲+热考题型+真题训练)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(人教版)(已下线)专题03 圆的基本性质(知识串讲+热点考题+真题训练)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(浙教版)湖北省武汉市光谷未来学校2023-2024学年 九年级上学期月考数学试题浙江省绍兴市越城区永和高级中学2023-2024学年九年级上学期10月月考数学试题江西省南昌市十校联考2023-2024学年九年级上学期期中数学试题(已下线)专题23.1 图形的旋转(知识梳理与考点分类讲解)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)山东省临沂市沂南县2023-2024学年九年级上学期期中数学试题甘肃省武威市武威第二十二中片联考2023-2024学年九年级上学期1月期末数学试题甘肃省武威市凉州区武威第二十二中学2023-2024学年九年级上学期期末数学试题(已下线)第3章 图形的平移与旋转(单元测试·综合卷)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)(已下线)第三章第02讲 图形的旋转(8类热点题型讲练)-【帮课堂】2023-2024学年八年级数学下册同步学与练(北师大版)
4 . 综合与实践
问题情境:
(1)如图1,在
和
中,
,
.如图2,将
绕顶点
按逆时针方向旋转
得到
,连接
,
,求证:
.
深入研究:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/c22d8004-18ba-4d79-9375-e1579301682f.png?resizew=325)
(2)①如图3,在正方形
和正方形
中,己知点
,
,
在同一直线上,连接
,
交于点
,求
的值;
②如图4,若将正方形
绕点
按顺时针方向旋转一定角度,
的值变化吗?请说明理由,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/f8fa8e6b-5887-4336-ba8c-78fe4e1367d4.png?resizew=309)
拓展应用:
(3)如图5,若把正方形
和正方形
分别换成矩形
和矩形
,且
,请直接写出此时
的值.
问题情境:
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c12e76fbd84eeec721386bd3b04cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c021993da445858448d368df42554c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab41cce6eb2d3058a644314865d16548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83ccde054ec5f3473ede6c07e484290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6023d93a7e60d68064e9c1e9a09a8e36.png)
深入研究:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/c22d8004-18ba-4d79-9375-e1579301682f.png?resizew=325)
(2)①如图3,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3177d540162abfae7d5fa564ab0f45a0.png)
②如图4,若将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3177d540162abfae7d5fa564ab0f45a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/f8fa8e6b-5887-4336-ba8c-78fe4e1367d4.png?resizew=309)
拓展应用:
(3)如图5,若把正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a803f4181df766cfba16e459267a66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3177d540162abfae7d5fa564ab0f45a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/ac21bdb4-4d21-4199-bee9-98b6af29e587.png?resizew=167)
您最近一年使用:0次
名校
5 . 如图,弧
所对圆心角
,半径为8,点C是
中点,点D弧
上一点,
绕点C逆时针旋转
得到
,则
的最小值是 ____________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](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/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/f7ab4d88-5eb1-4d7f-ac36-611922be2938.png?resizew=157)
您最近一年使用:0次
2024-01-22更新
|
286次组卷
|
11卷引用:2023年广西贵港市港北区中考二模数学试题
6 . 如图,点P为等边三角形
外一点,连接
,
,若
,
,
,则
的长是 _________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e293cc88d7502fbb4f7a0b6b1d3c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2cf53f1f565275e27fc401d53fc19ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5479a3dc9e022f1c6aab7086852ab59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
您最近一年使用:0次
2024-01-22更新
|
121次组卷
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12卷引用:2023年广西贺州市昭平县中考二模数学试题
名校
7 . 阅读下面材料,并解决问题:
内有一点P,若点P到顶点A、B、C的距离分别为3,4,5,求
的度数.为了解决本题,我们可以将
绕顶点A旋转到
处,此时
,这样就可以利用旋转变换,将三条线段
转化到一个三角形中,从而求出
;
(2)基本运用
请你利用第(1)题的解答思想方法,解答下面问题
已知如图②,
为
上的点且
,求证:
;
(3)能力提升
如图③,在
中,
,点O为
内一点,连接
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af51564ad769756ddda5ff0c7f07408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3e6df256ff2ea759572fb5cffe1463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef613539d5e569f11d33c1f46d03120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a84b7de4bcbaa36f542b7ac3886bba.png)
(2)基本运用
请你利用第(1)题的解答思想方法,解答下面问题
已知如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4064da7c5eab8e4daad217f9cd438a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3287f3654372fc20f43ab07eff5adfc1.png)
(3)能力提升
如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aac20df6ccaf9ddf7902e9ac39989aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6330ad126b6937ea61f25437ae9038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2765ee49bfe09fed44327e8be2347dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c62635ee088808196e070c44ba6c20fb.png)
您最近一年使用:0次
2024-01-19更新
|
473次组卷
|
49卷引用:广西壮族自治区南宁市西乡塘区第十八中学2023-2024学年九年级上学期期中数学试题
广西壮族自治区南宁市西乡塘区第十八中学2023-2024学年九年级上学期期中数学试题【全国百强校】福建省龙岩市第一中学2019届九年级(上)期中数学试题江苏省南通市海门市2019-2020学年九年级上学期期中数学试题广东省阳江市部分学校联考2019-2020学年九年级上学期期中数学试题(已下线)23.1 图形的旋转-2020-2021学年九年级数学上册高频易错题汇编(人教版)江苏省泰州市海陵区海军中学2020-2021学年九年级上学期期中数学试题广东省广州市白云区永平片2021-2022学年九年级上学期期中数学试题重庆市綦江区联盟校2022-2023学年九年级上学期期中数学试题浙江省金华市浦江县2022-2023学年九年级上学期10月月考数学试题(已下线)题型五 综合与实践 3(已下线)专题01 与旋转有关的计算(30题)-【帮课堂】2023-2024学年九年级数学上册同步学与练(人教版)(已下线)专题03 旋转(知识串讲+热考题型+真题训练)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(人教版)(已下线)专题03 圆的基本性质(知识串讲+热点考题+真题训练)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(浙教版)(已下线)第二十三章 旋转 能力提升卷(B卷)-2023-2024学年九年级数学上册《知识解读·题型专练》(人教版)山东省日照市新营中学2023-2024学年九年级上学期10月月考数学试题福建省福州立志中学2023-2024学年九年级上学期期中数学试题湖北省随州市广水市2023-2024学年九年级上学期期中数学试题辽宁省抚顺市新宾满族自治县2023-2024学年九年级上学期期中数学试题安徽芜湖第二十九中学2023-2024学年九年级期上学期中数学试题重庆市九龙坡区渝高中教育集团2023-2024学年九年级上学期期中数学试题湖北省随州市随县部分学校联考2023-2024学年九年级上学期期中数学试题山东省滨州市无棣县2023-2024学年九年级上学期期中数学试题安徽省芜湖市第四十三中学2023-2024学年九年级上学期期中数学试题江西省上饶市余干县2023-2024学年九年级上学期期中数学试题湖北省随州市曾都区八角楼初级中学2023-2024学年九年级上学期第二次月考数学试题(已下线)期中复习(易错50题23个考点)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(浙教版)(已下线)清单03旋转(12个考点梳理+题型解读+核心素养提升+中考聚焦)-2023-2024学年九年级数学上学期期末考点大串讲(人教版)(已下线)期末复习(易错45题21个考点)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(浙教版)(已下线)期末复习(易错60题34考点)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(苏科版)(已下线)期末复习(易错48题28个考点)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(人教版)山东省日照市东港区日照高新区中学2023-2024学年九年级上学期期末数学试题(已下线)数学-2024年中考考前最后一课(7)江西省九江市同文中学2018-2019学年初二下学期期中数学试卷福建省漳州市平和县2018-2019学年八年级下学期期中数学试题(已下线)(培优特训)专项9.4 旋转常考综合运用-2022-2023学年八年级数学下册《同步考点解读·专题训练》(苏科版)(已下线)期中真题精选(常考60题专练)-2022-2023学年八年级数学下学期期中期末考点大串讲(北师大版) 江苏省泰州市姜堰区四校联考2022-2023学年八年级下学期第一次月考数学试卷 山东省菏泽市牡丹区牡丹区第二十一初级中学2022-2023学年八年级下学期6月月考数学试题江西省九江市永修县外国语学校2022-2023学年八年级下学期期中数学试题陕西省西安市雁塔区西安市曲江第二中学2021-2022学年八年级下学期期中数学试题山东省淄博市高青县2023-2024学年八年级上学期期末数学试题山东省淄博市张店区新元学校2023-2024学年八年级上学期12月月考数学试题(已下线)山东省东营市东营区东营区文华学校2023-2024学年八年级上学期12月月考数学试题江苏省泰州市靖江市滨江学校2023-2024学年八年级下学期3月月考数学试题(已下线)第03讲 图形的旋转(4个考点+4种题型+强化训练)-【帮课堂】2023-2024学年八年级数学下册同步学与练(苏科版)广东省深圳市宝安区10校联考2023-2024学年八年级下学期期中数学试题(已下线)专题03 图形的平移与旋转(考题猜想,易错必刷30题9种题型专项训练)-2023-2024学年八年级数学下学期期末考点大串讲(北师大版)(已下线)第3章 图形的平移与旋转常考易错(10个考点40题专练)-2023-2024学年八年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(北师大版)(已下线)期末复习(易错题60题23个考点)-2023-2024学年八年级数学下学期期末考点大串讲(北师大版)
8 . 问题发现:
如图1,在
中,
,
,D为BC边上一点(不与点B,C重合),将线段AD绕点A逆时针旋转60°得到AE,连接EC,则:
的度数是______;②线段AC,CD,CE之间的数量关系是______;
拓展探究:
(2)如图2,在
中,
,
,D为BC边上一点(不与点B,C重合),将线段AD绕点A逆时针旋转90°得到AE,连接EC,请写出
的度数及线段AD,BD,CD之间的数量关系,并说明理由;
解决问题:
(3)如图3,在
中,
,
,
,若点A满足
,
,求线段AD的长度.
如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
拓展探究:
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421456e82c859184328587723f85034d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
解决问题:
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2eece85313176545a1e924b8328427b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a9b1d39efca82ac0f3bf059e49b103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430b77d8d2a99713b192dc729ddc2275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a20cb14fea4a7cad4b7775a3dd67df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
您最近一年使用:0次
名校
9 . 如图,边长为6的正方形
的边
上有一点
,若线段
绕点
顺时针旋转
与线段
重合,则四边形
的面积______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/edceeb7c-fa1b-4528-9665-65a136d83921.png?resizew=156)
您最近一年使用:0次
2024-01-09更新
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69次组卷
|
2卷引用:广西壮族自治区南宁市兴宁区第三中学2023-2024学年九年级上学期12月月考数学试题
10 . (1)【学习心得】小刚同学在学习完“圆”这一章内容后,感觉到一些几何问题,如果添加辅助圆,运用圆的知识解决,可以使问题变得非常容易.例如:如图1,在
中,
,
,
是
外一点,且
,求
的度数,若以点
为圆心,
为半径作辅助圆
,则点
、
必在
上,
是
的圆心角,而
是圆周角,从而可容易得到
______°.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/3c406fb2-b1f6-44b9-b2be-64cad9ed00a5.jpg?resizew=411)
(2)【问题解决】如图2,在四边形
中,
,
,求
的度数.小刚同学认为用添加辅助圆的方法,进而可以利用圆周角的性质求出
的度数,请运用小刚的思路解决这个问题.
(3)【问题拓展】
如图3,在正方形
中,
,动点
,
分别在边
,
上移动,且满足
.连接
和
,交于点
.
①请你写出
与
的数量关系和位置关系,并说明理由;
②点E从点D开始运动到点C时,点P也随之运动,请求出点P的运动路径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.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/3c20d0b44025a639ce3a92d639dae587.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/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b5c0e0724cce5c25a88dca5e9220c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/3c406fb2-b1f6-44b9-b2be-64cad9ed00a5.jpg?resizew=411)
(2)【问题解决】如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b6e08fde74010412a6f14ad4dfbcc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd66e57d120f760fb3e32d8a895fe0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(3)【问题拓展】
如图3,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1db2c0955e5a5be47faf855bca738a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①请你写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
②点E从点D开始运动到点C时,点P也随之运动,请求出点P的运动路径长.
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