名校
1 . 已知:如图
和
都是等边角形.
是
延长线上一点,
与
相交于点
.
、
相交于点
,
、
相交于点
.
(1)在图①中,求证:
;
(2)当
绕点
沿逆时针方向旋转到图②时,
________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/19/9a09881f-a7f6-4bfa-bb67-e49a070df0aa.png?resizew=409)
(1)在图①中,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a84b7de4bcbaa36f542b7ac3886bba.png)
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甘肃省定西市岷县2023-2024学年九年级上学期期中数学试题(已下线)第二十三章 旋转 单元过关检测01-2022-2023学年九年级数学上册同步考点知识清单+例题讲解+课后练习(人教版)广东省珠海市香洲区珠海市紫荆中学桃园校区2022-2023学年九年级上学期10月期中数学试题吉林省长春市南关区新解放学校2022-2023学年八年级上学期9月月考数学试题吉林省长春市吉林大学附属中学2022-2023学年八年级上学期10月月考数学试题
真题
2 .
中,
,垂足为E,连接
,将
绕点E逆时针旋转
,得到
,连接
.
上,
时,如图①,求证:
;
(2)当点E在线段
延长线上,
时,如图②:当点E在线段
延长线上,
时,如图③,请猜想并直接写出线段AE,EC,BF的数量关系;
(3)在(1)、(2)的条件下,若
,
,则
_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c284ccb6f4ee7a8690013d2ce16e226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d541cb8b77758cc180bd2c176878a86.png)
(2)当点E在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c284ccb6f4ee7a8690013d2ce16e226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207be8e34da2b04f5dfe7a69be80d479.png)
(3)在(1)、(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f218914337edd06e59e75d90b777e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f341b98caabf99bc683ce8407068735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5277fa450a0c513a86a74420f8ee99f6.png)
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11卷引用:甘肃省定西市安定区城区学校联考2023-2024学年九年级下学期3月月考数学试题
甘肃省定西市安定区城区学校联考2023-2024学年九年级下学期3月月考数学试题2023年黑龙江省牡丹江市中考数学真题(已下线)第23单元03巩固练(已下线)专题23.6 图形的旋转(直通中考)(培优练)-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)(已下线)专题23.16 旋转(直通中考)(全章提升练)-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)(已下线)专题31 几何综合压轴题(共23道)-学易金卷:2023年中考数学真题分项汇编(全国通用)2024年辽宁省抚顺市望花区中考一模数学试题(已下线)第6讲 多边形与平行四边形2024年山东省潍坊市初中学业水平考试二模数学模拟试题 (已下线)专题9.12 平行四边形(直通中考)(提升练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)(已下线)专题6.15 平行四边形(全章直通中考)(培优练)-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)
3 . 如图1,我们把对角线互相垂直的四边形叫做垂美四边形.
(1)概念理解:我们已经学习了平行四边形、菱形、矩形、正方形,在这四种图形中是垂美四边形的是__________.
(2)性质探究:如图2,已知四边形
是垂美四边形,求证:
.
(3)问题解决:如图3,分别以
的直角边
和斜边
为边向外作正方形
和正方形
,连接
,
,
,
交
于点
,已知
,
,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/8fa7e61c-e159-455d-8f21-110e7a85aaa5.png?resizew=434)
(1)概念理解:我们已经学习了平行四边形、菱形、矩形、正方形,在这四种图形中是垂美四边形的是__________.
(2)性质探究:如图2,已知四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4146ca0a38dadc2c03f67b8ccc5f7c8.png)
(3)问题解决:如图3,分别以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76899b3a0bfbbdae7cb1148ad4bf018.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/ff7a0bfc593a8a33b6cade6ba213904c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
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2卷引用:甘肃省白银市平川区三校联考2023-2024学年九年级上学期期中数学试题
真题
解题方法
4 . 综合与实践
数学模型可以用来解决一类问题,是数学应用的基本途径.通过探究图形的变化规律,再结合其他数学知识的内在联系,最终可以获得宝贵的数学经验,并将其运用到更广阔的数学天地.
和
中,
,
,
,连接
,
,延长
交
于点
.则
与
的数量关系:______,
______
;
(2)类比探究:如图2,在
和
中,
,
,
,连接
,
,延长
,
交于点
.请猜想
与
的数量关系及
的度数,并说明理由;
(3)拓展延伸:如图3,
和
均为等腰直角三角形,
,连接
,
,且点
,
,
在一条直线上,过点
作
,垂足为点
.则
,
,
之间的数量关系:______;
(4)实践应用:正方形
中,
,若平面内存在点
满足
,
,则
______.
数学模型可以用来解决一类问题,是数学应用的基本途径.通过探究图形的变化规律,再结合其他数学知识的内在联系,最终可以获得宝贵的数学经验,并将其运用到更广阔的数学天地.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d0dd547921b8a35acf7b407fac21b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b5c0e0724cce5c25a88dca5e9220c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)类比探究:如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2ee144fbda9152177857f19d5aaede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
(3)拓展延伸:如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a93128719573a60a1bdcf0ede1116b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396632dba26d326a6b69f0bb7016bd14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(4)实践应用:正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81d5974e8669eb588401203de18a3ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bec03e804f0cea1db5cde2aa185056a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cde75c806c60b4319ba2c1bc2f3dc91.png)
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12卷引用:甘肃省平凉市庄浪县联盟校2023-2024学年九年级下学期4月期中考试数学试题
甘肃省平凉市庄浪县联盟校2023-2024学年九年级下学期4月期中考试数学试题2023年黑龙江省齐齐哈尔市中考数学真题(已下线)专题17 几何压轴题-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(全国通用)湖北省荆楚初中名校联盟2023-2024学年九年级上学期期中数学试题湖北省襄阳市八校2023-2024学年九年级上学期联考数学试题(已下线)专题6 类比思想(已下线)数学(山西卷)-学易金卷:2024年中考第一次模拟考试江西省吉安市十校联盟2023-2024学年九年级下学期期中数学试题(已下线)突破05 平移、旋转、折叠等操作探究问题(4类重点考向)-备战2024年中考数学真题题源解密(全国通用)(已下线)专题10 三角形压轴题综合-2024年中考数学二轮热点题型归纳与变式演练(全国通用)2024年河南省驻马店市确山县中考二模数学试题2023年江苏省盐城市初中学业数学水平模拟预测题
5 . 已知
是等边三角形.
绕点A逆时针旋转角θ(
),得到
,
和
所在直线相交于点O.
①如图a,当
时,
与
是否全等?___ (填“是”或“否”),
___ 度;
②当
旋转到如图b所在位置时,求
的度数;
(2)如图c,在
和
上分别截取点
和
,使
,
,连接
,将
绕点A逆时针旋转角(
),得到
,
和
所在直线相交于点O,请利用图c探索
的度数,直接写出结果,不必说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30af76bf4cc9658e721471fbddab7f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
①如图a,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde36c2a0552e7a0a679f5763d6cc588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7c903121c158dafe5e7f3712897ed8.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
(2)如图c,在
![](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/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a27fbd3e0086e6c309508434ff295a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2127f7289f47a5d8a278ac9514fa9f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737bc35da650eda3825d29799b5f86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c021993da445858448d368df42554c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30af76bf4cc9658e721471fbddab7f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.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/7307ac7510cf35f74337d368b94da4e5.png)
您最近一年使用:0次
2023-06-17更新
|
109次组卷
|
4卷引用:甘肃省定西市岷县西寨九年制学校2022-2023学年九年级上学期期中数学试题
名校
6 . 如图,已知点
,
,
,
在一条直线上,
,
,
,求证:
.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077d04feba1b55c079208435f7b561b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2710d1ae999c3297ce2b89c93754a462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5adc18ca424552b35ab939e9d57943e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07c80ef457552a69ffb501a8d9d1917.png)
您最近一年使用:0次
2023-06-05更新
|
145次组卷
|
9卷引用:2024年甘肃省武威市天祝藏族自治县天祝县民族中学联片教研中考三模数学试题
7 .
和
都是等边三角形,连接
,F,G,H分别是
,
,
的中点,连接
,
,
,
.
(1)如图1,当点B,C,D在一条直线上时,线段
与
的数量关系为___________,
___________°.
(2)当
绕顶点C逆时针旋转到如图2所示的位置时,(1)中的结论是否仍然成立?若成立,请说明理由;若不成立,请写出新的结论并证明.
(3)已知
的边长为
,
的边长为2,在
由图1的位置绕点C逆时针旋转一周的过程中,当
时,请直接写出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/a61dc788-f2b8-45f0-b8d7-812d358dad75.png?resizew=600)
(1)如图1,当点B,C,D在一条直线上时,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64de9f9a290cd29d59e199022532afd2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a93d5b1395e1156f5505f9c47120781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
您最近一年使用:0次
8 . (1)建立模型:如图1,在正方形
中,E,F分别是
上的点,且
,探究图中线段
之间的数量关系.小王同学探究此问题的方法是将
绕A点逆时针旋转
使得B与D重合,连接
,由此得到
______,再证明
______,可得出线段
之间的数量关系为______.
(2)拓展延伸:如图2,在等腰直角三角形
中,
,点G,H在边
上,且
,写出图中线段
之间的数量关系并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8dbf16d3adcc74fbea454665bc66ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/924caa65e52a01ce7b05d1f8c3519ba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f76e37d6e6b182896ccaaa187cfe07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122f616883428c5d3ed34c2419b15d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/924caa65e52a01ce7b05d1f8c3519ba6.png)
(2)拓展延伸:如图2,在等腰直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea71984f1e84123b0abe5ba92cb177cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4978985f24d9a98892cb291b30c841c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f6c33c88e606f68681d11e1255cd11.png)
您最近一年使用:0次
2023-05-22更新
|
194次组卷
|
5卷引用:2023年甘肃省平凉市中考数学二模试题
2023年甘肃省平凉市中考数学二模试题2023年甘肃省白银市景泰县第四中学中考三模数学试题2023年甘肃省庆阳市中考二模数学模拟试题2023年甘肃省平凉市初中毕业与高中阶段招生考试(二) 数学模拟试题(已下线)专题1.20 特殊平行四边形(挑战综合题分类专题)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)
名校
9 . 如图,在正方形
中,E为
上一点,连接
,
交对角线
于点F,连接
,若
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f22d612147f72f1583bcd05fe233e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f9f8b429cc830b6c9c4ade5d4db25c.png)
A.80° | B.70° | C.75° | D.45° |
您最近一年使用:0次
2023-05-16更新
|
521次组卷
|
13卷引用:甘肃省兰州市城关区第三十五中学2022-2023学年九年级上学期期中数学试题
甘肃省兰州市城关区第三十五中学2022-2023学年九年级上学期期中数学试题重庆市第十一中教育集团2022-2023学年九年级下学期3月月考数学试题(已下线)专题03 正方形的性质与判定(八大类型)-2023-2024学年九年级数学上册《知识解读·题型专练》(北师大版)(已下线)第一章 特殊平行四边形 达标检测卷(A卷)-2023-2024学年九年级数学上册《知识解读·题型专练》(北师大版)广东省深圳市宝安区2023-2024学年九年级上学期期中数学试题(已下线)中考热点05 几何求解选择类(4题型+满分技巧+限时检测)-2024年中考数学【热点·重点·难点】专练(重庆专用)(已下线)专题 18.59 平行四边形(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)吉林省名校调研卷系列(省命题A)2022-2023学年八年级下学期期中数学试题湖北省黄冈市黄梅县2022-2023学年八年级下学期期中数学试题(已下线)专题5.34 特殊平行四边形(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(浙教版)江苏省连云港市海州区新海初级中学2022-2023学年八年级下学期4月月考数学试题(已下线)第08讲 正方形(3大考点+6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)(已下线)专题02 矩形菱形正方形及中位线(六大题型)-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(苏科版)
10 . 如图,在
中,
,以
为弦作
,交
的延长线于点
,且
,
.
为
的切线;
(2)若
的半径为
,
,求劣弧
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f213621229843639780aae87fa29584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adcd2b4a3912db651f82c805c1423d7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d2d3643a9579f2c693ef86909441e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
2023-05-09更新
|
377次组卷
|
4卷引用:2024学年甘肃省平凉市初中毕业与高中阶段招生考试模拟数学模拟预测题(一)