1 . 如图,以锐角
的边
为边向外作正方形
和正方形
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/206ead90-2ca1-498b-ba08-43bcba7d95df.png?resizew=268)
(1)求证:
;
(2)图中
可以通过一次变换得到
,请你说出变换过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f279d402050043751e941f3bd7aaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddcd5435b39971f897210aa0b66a259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5541d498cf8a609c87ec3a82006addcf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/206ead90-2ca1-498b-ba08-43bcba7d95df.png?resizew=268)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ca73acec7d14722867175b6cbc53fa.png)
(2)图中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09a769a75b107390b9eeccc929f761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55bd1ad9e6d1bb7403eff61ad2b10b4.png)
您最近一年使用:0次
2023-03-07更新
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165次组卷
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4卷引用:2022年内蒙古兴安盟科尔沁右翼前旗中考二模数学试题
2 . 如图,直线
与x轴、y轴交于A、B两点,
的平分线所在的直线
的解析式是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4364f108bcf19f28eadced51cd04d8a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a457b899731577bfe61dda594ae4eec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-03-06更新
|
759次组卷
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6卷引用:2023年内蒙古自治区包头市下学期九年级数学第一次模拟试题
2023年内蒙古自治区包头市下学期九年级数学第一次模拟试题【校级联考】山东省临沂市罗庄区2017-2018学年八年级(下)期末数学试题福建省三明市尤溪县2021-2022学年八年级上学期期中数学试题(已下线)专题19.52 一次函数(全章复习与巩固)(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(人教版)陕西省西安市高新逸翠园初级中学2023-2024学年八年级上学期第二次月考数学试题(已下线)期末真题必刷02(基础60题60个考点专练)-2023-2024学年八年级数学下学期期末考点大串讲(人教版)
3 . (1)问题发现:如图1,在
中,
,D为
边上一点(不与点B、C重合)将线段
绕点A逆时针旋转90°得到
,连接
,则线段
与
的数量关系是 ,位置关系是 ;
(1)探究证明:如图2,在
与
中,
,
,将
绕点A旋转,使点D落在
的延长线上时,连接
,写出此时线段
,
,
之间的等量关系,并证明;
(2)拓展延伸:如图3,在四边形
中,
,
.若
,
,请求出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddf629bfb2d7b9daea6f2c1553360af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(1)探究证明:如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddf629bfb2d7b9daea6f2c1553360af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a483d9fe5928dada6560729f91967e.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/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)拓展延伸:如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776c611b65f3759c6ed74041c4534a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/81ab89a7-a745-4191-b948-bb3ecc87dc45.png?resizew=497)
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4 . 在平面直角坐标系中,点
的坐标是
,过点
作直线
轴于
,作直线
轴于
,点
、
分别是直线
和直线
上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/10cd2dff-36ff-41fc-8f61-959e12b7e2c6.png?resizew=421)
(1)如图
,当点
、
分别在线段
和线段
上时,求
的周长;
(2)如图
,当点
在线段
的延长线上,点
在线段
的延长线上时,猜想线段
、
和
之间的数量关系,并证明你的猜想;
(3)若
,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20aa36cae34afaa391a4319c9c5eb87a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed78ea04659678011a0e4564cb781a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2dcd849446295cbd268b3a8489268f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54edadd93c68b0105da2dccc8c3f410c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/10cd2dff-36ff-41fc-8f61-959e12b7e2c6.png?resizew=421)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](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/e8dcc9f79fe5f07f25447aa442ee14ad.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5fce3f8f8326cffdb3090a90a273c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
您最近一年使用:0次
5 . 如图,
与
的
边相切于点
,与
、
边分别交于点
、
,
,
是
的直径.
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996196505206785/3160620839747584/STEM/b13ae738734541dea8b40462aa244d0f.png?resizew=130)
(1)求证:
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa317c983e05adf97f25ba296d367fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2022/6/7/2996196505206785/3160620839747584/STEM/b13ae738734541dea8b40462aa244d0f.png?resizew=130)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
6 . 已知:正方形
中,
,
绕点A顺时针旋转,它的两边分别交
(或它们的延长线)于点M,N,当
绕点A旋转到
时(如图1),易证
.
![](https://img.xkw.com/dksih/QBM/2022/12/17/3132917621235712/3157416791482368/STEM/a147ded529a141b7b103e55485163a03.png?resizew=431)
(1)当
绕点A旋转到BM≠DN时(如图2),线段
和
之间有怎样的数量关系?写出猜想,并加以证明.
(2)当
绕点A旋转到如图3的位置时,线段
和
之间又有怎样的数量关系?写出猜想并加以证明.
(3)图3中,若
,求
的面积为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4794cf7c57bdd4825d9e6615e2527a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64cb9faca188676503d9a2f2e476b84d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f3175a979c2f908d6c5665e14894b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2519c65ca5090d8cd448cab633ea1a1b.png)
![](https://img.xkw.com/dksih/QBM/2022/12/17/3132917621235712/3157416791482368/STEM/a147ded529a141b7b103e55485163a03.png?resizew=431)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6173d957eb8bcdc572fd0f91a017fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6173d957eb8bcdc572fd0f91a017fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)图3中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbe1cecb6515834d9a7a3943c6bf95e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
您最近一年使用:0次
名校
7 . 如图,
是由
在平面内绕点
旋转
得到的,且
,
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/8f3f3176-eae9-474b-8006-b7fde70373fa.png?resizew=162)
(1)求证:
;
(2)试判断四边形
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2036191be2322003aaee6bb411868327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a702c324e0c76150540c3d32df802077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/8f3f3176-eae9-474b-8006-b7fde70373fa.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3894b69bb99e5b306d3ad0c7e66bc7.png)
(2)试判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
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2023-01-09更新
|
879次组卷
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64卷引用:内蒙古自治区呼和浩特市实验教育集团2021-2022学年九年级上学期期中数学试题
内蒙古自治区呼和浩特市实验教育集团2021-2022学年九年级上学期期中数学试题2016届重庆市合川区七校联考九年级上学期期中数学试卷2016届山东省德州市九年级下学期开学数学试卷重庆市九龙坡区七校联考2018届九年级上学期素质测查(一)数学试题人教版九年级数学上册 第23章 旋转 同步单元检测试题人教版数学九年级上册 第23章 旋转 全章测试题(1)江西省抚州市崇仁县白路中学2017-2018年上学期九年级数学期末试题湖北省襄阳老河口市2018届九年级下学期第一次月考数学试题【校级联考】湖北省襄阳市老河口市2018届九年级中考数学模拟试卷(3月份)【校级联考】吉林省四平市伊通县2018届九年级上学期期末考试数学试题【市级联考】江西省南昌市2019届九年级上学期期中考试数学试题【校级联考】河北省博野县2019届九年级(上)期末数学试题【校级联考】河北省保定市博野县2019届九年级(上)期末数学试题河北省廊坊市广阳区2019届九年级中考数学一模试题2017人教版九年级数学上册期末检测题(一)江西省上饶市第二中学2019-2020学年九年级期中数学试题福建省厦门市厦门双十中学2019-2020学年九年级上学期期中数学试题海南省省直辖县级行政单位琼中黎族苗族自治县2019-2020 学年九年级上学期期末数学试题甘肃省武威市2019-2020学年九年级上学期期末数学试题(已下线)【万唯原创】2016年安徽省中考数学-面对面-第五单元23(已下线)【南昌新东方】2020年10月雷式三中初三月考 48甘肃省庆阳市庆阳第四中学2020-2021学年九年级上学期第三次月考数学试题广东省江门市蓬江区2020-2021学年九年级上学期期末数学试题云南省昆明市第八中学2020-2021学年九年级上学期第一次月考数学试题湖南省长沙市广益实验中学2021-2022学年九年级上学期第一次月考数学试题江西省赣州市章贡区2021-2022学年九年级上学期期中数学试题安徽省亳州市利辛中学2021-2022学年九年级上学期第二次月考数学试题2022年湖北省黄冈市浠水县河口中学九年级下学期中考一模数学试题甘肃省武威市民勤县第六中学2021-2022学年九年级上学期第三次诊断考试数学试题(已下线)第二十三章 旋转 单元测试卷(A卷)(原卷+解析卷)-2022-2023学年九年级数学上册《同步考点解读·专题训练》(人教版)福建省长汀县第四中学2022-2023学年九年级上学期适应性练习(一)数学试题新疆维吾尔自治区新疆师范大学附属中学2021-2022学年九年级上学期期中数学试题新疆维吾尔自治区第三中学2022-2023学年九年级上学期期中数学试题贵州省黔东南苗族侗族自治州2022-2023学年九年级上学期期中数学试题安徽省芜湖市无为市华星学校2021-2022学年九年级上学期期中考试数学试卷河南省信阳市潢川四中2022-2023学年九年级上学期第一次月考数学试题贵州省黔东南州教学资源共建共享联合学校2022-2023学年九年级上学期期中数学试题黑龙江省佳木斯市桦南县实验中学2022-2023学年九年级上学期期中考试数学试题新疆维吾尔自治区巴音郭楞州和静县2022-2023学年九年级上学期期中数学试题安徽省亳州市利辛县向阳中学2022-2023学年九年级上学期数学第三次月考测试题安徽省淮南市西部地区2022-2023学年九年级上学期数学第二次联考试卷(已下线)湖北省恩施州利川市2022-2023学年九年级上学期期末数学试题变式题16-20安徽省芜湖市无为市2022-2023学年九年级上学期期末考试 数学试题 四川省南充市顺庆区南充高级中学2022-2023学年九年级上学期期末数学试题广东省惠州市惠南学校2022-2023学年九年级上学期第一次月考数学试题新疆维吾尔自治区喀什地区巴楚县2022-2023学年九年级下学期开学考试数学试题江苏省南通中学附属实验学校2023-2024学年九年级上学期开学测试数学试题(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)江西省南昌市心远中学教育集团2023-2024学年九年级上学期月考数学试题江西省南昌市青山湖区心远中学教育集团2023-2024学年九年级上学期月考数学试题四川省广元市2023-2024学年九年级上学期期中数学试题广东省惠州市惠城区惠州市铁路学校2023-2024学年九年级上学期期中联考数学试题福建省南平市第三中学2023-2024学年九年级上学期第三次月考数学试题吉林省吉林市桦甸市2023-2024学年九年级上学期期末数学试题吉林省辽源市西安区2023-2024学年九年级上学期期末数学试题吉林省白山市第三中学、白山市第五中学、白山市第七中学2023-2024学年九年级上学期第三次月考测试数学试卷【市级联考】山东省泰安市新泰市2017-2018学年八年级(上)期末数学试卷(五四学制)【市级联考】湖南省常德市市直学校2018-2019学年八年级下学期期中考试数学试题山东省东营市胜利第二中学2018-2019学年八年级下学期期中考试数学试题广西壮族自治区贵港市覃塘区2020-2021学年八年级下学期期中数学试题湖南省永州市剑桥学校2020-2021学年八年级下学期期中数学试题(已下线)第15讲 菱形的性质与判定-【寒假自学课】2022年八年级数学寒假精品课(苏科版)(已下线)第9章 中心对称图形-平行四边形 单元检测卷(B卷)-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)第2章 四边形(A卷·知识通关练) -【单元测试】2022-2023学年八年级数学下册分层训练AB卷(湘教版)
8 . 综合与实践
问题情境:
如图①,在
中,
,
,四边形
为正方形,当点D、F分别在AC,BC边上时,显然有
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/0a29f1ef-8136-4042-bd98-26449a414842.png?resizew=463)
(1)操作发现:
将正方形
绕点C顺时针旋转到如图②的位置时,
是否成立?若成立,请给出证明;若不成立,请说明理由.
(2)将正方形
绕点C顺时针旋转到如图③的位置(点E在线段
上)时,延长
交
于点H,交
于点M,求证:
.
问题解决:
(3)在(2)的条件下,当
,
时,求
的长.
问题情境:
如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0296a2edfc055568060e4ae66605a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5232ca3c1e0ce4064d0094502aacb063.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/0a29f1ef-8136-4042-bd98-26449a414842.png?resizew=463)
(1)操作发现:
将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0296a2edfc055568060e4ae66605a86.png)
(2)将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a72ab9f7f6b1efc684f28e9389b9b2.png)
问题解决:
(3)在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d79e7020414add95907e061df505ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
您最近一年使用:0次
2023-01-09更新
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84次组卷
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5卷引用:内蒙古自治区赤峰市赤峰市2023-2024学年九年级上学期12月月考数学试题
9 . 把两个等腰直角三角形
和
按图
所示的位置摆放,将
绕点
按逆时针方向旋转,如图
,连接
,
,设旋转角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/4615c614-52ba-4ca1-be19-b7cd04defc03.png?resizew=580)
(1)如图
,
与
的数量关系是______,
与
的位置关系是______;
(2)如图
,
中
与
的数量关系和位置关系是否仍然成立,若成立,请证明;若不成立,请说明理由;
(3)如图
,当点
在线段
上时,求证:
;
(4)当旋转角
______
填度数
时,
的面积最大.
![](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/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813472fe85905302843cb3aadec9c8ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/4615c614-52ba-4ca1-be19-b7cd04defc03.png?resizew=580)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05c50ea5f6068e3ebc11ec59723d083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b2cc1d0bfd22c88286880b9da1f6f4.png)
(4)当旋转角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9251dff989f7d60db751b73033dee269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
您最近一年使用:0次
2023-01-03更新
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3卷引用:内蒙古自治区巴彦淖尔市杭锦后旗2023-2024学年九年级上学期期中数学试题
10 . 如图1,在
中,
,
,
.
;
(2)如图2,
交
于点P,若
,求证:A,O,D三点共线;
(3)如图3,在(2)的条件下,若
于H,过点O作
于E,
,
,求
,
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f0f038ebe04ea9441bd5eedf069806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a23f35ebcd9799d82c1e41c09781a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4bf38cff51582009a357b922611f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0866e1551b61074ca8e61261ecd1f9dc.png)
(2)如图2,
![](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/d0792b9a92979e7d51278435b8a76ea5.png)
(3)如图3,在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771b610e4ddefa739a985d1e5462ce5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299fe914d64f3a06f9b641d5591fc47a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a8da228d8035914f92f735f7b98065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c81a11beb34dbaeba022b3432e48442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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7卷引用:2023年内蒙古北方重工业集团有限公司第一中学中考模拟数学模拟预测题
2023年内蒙古北方重工业集团有限公司第一中学中考模拟数学模拟预测题(已下线)2023年湖北省黄冈市中考数学真题变式题21-24题 福建省福州市仓山区时代中学2021-2022学年八年级上学期期末数学试卷(已下线)八年级数学上学期期末【全真模拟卷02】-2022-2023学年八年级数学上学期考试满分全攻略(人教版)(已下线)17.1 勾股定理(第3课时)(练习)-2022-2023学年八年级数学下册同步精品课堂(人教版)福建省泉州市台商投资区2022—2023学年八年级上学期期末考试数学试卷(已下线)期末难点特训(四)与勾股定理有关的压轴题-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(人教版)