1 . 几何探究:如图
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/801197e1-c23e-4ced-bc9f-1a3ba2982129.png?resizew=504)
(1)【问题发现】如图1所示,
和
是有公共顶点的等边三角形,
的值是 ;(请直接写出答案)
(2)【类比探究】如图2所示,
和
是有公共顶点的含有
角的直角三角形,(1)中的结论还成立吗?请说明理由;
(3)【拓展延伸】如图3所示,
和
是有公共顶点且相似比为
的两个等腰直角三角形,将
绕点A自由旋转,若
,当B、D、E三点共线时,直接写出
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/801197e1-c23e-4ced-bc9f-1a3ba2982129.png?resizew=504)
(1)【问题发现】如图1所示,
![](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/a9af91834644b94e1b023b33e15a0644.png)
(2)【类比探究】如图2所示,
![](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/f6b86c22b670a8e9f3896f9e8883fbbb.png)
(3)【拓展延伸】如图3所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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2 . 探究以下问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/08c5ddb7-9ec7-43b7-bee6-e7b19df4054d.png?resizew=452)
(1)如图①,已知
,求证:
;
(2)如图②,在
和
中,
,
,
与
相交于点
,点
在
边上,求证:
;
(3)如图③,
是
内一点,
,
,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/08c5ddb7-9ec7-43b7-bee6-e7b19df4054d.png?resizew=452)
(1)如图①,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67061e6fa526d1e082bed7b01c819982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aa98026a648010decfaf672dc9141c9.png)
(2)如图②,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/e8abfdaab699cfe51bb9678110ad6aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4ed3163605f3c832ff52779a12f507.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/a0ed1ec316bc54c37c4286c208f55667.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/8f3327f9755308e9be1ff45f52f9ed0b.png)
(3)如图③,
![](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/fa251b3038b2332b7df3bfafa0768d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8abfdaab699cfe51bb9678110ad6aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b84064bf9d09747ef715ff38a4bcb69.png)
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3 . 如图,E是正方形
的
边上的一点,
于点F.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb91cb9a5a14169845d700fbd95890ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df627c90e145cc9395e1c7923c19188.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/4dafc131-3e41-4c55-8d65-f00dc4ea3487.png?resizew=133)
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4 . 如图1,在
中,
,
,
,点
分别是边
的中点,连接
.将
绕点
逆时针方向旋转,记旋转角为
.
当
时,
______;
当
时,
______.
(2)拓展探究
试判断:当
时,
的大小有无变化?请仅就图2的情形给出证明.
(3)问题解决
绕点
逆时针旋转至
三点在同一条直线上时,请直接写出线段
的长______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887721a843b2dc8e947cc42d09868e33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7e8c4e8015bc1a44a89460e1dc0d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce24b781c66474602b5ba6627241531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd284be60584dfae454b1a125468947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce24b781c66474602b5ba6627241531.png)
(2)拓展探究
试判断:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcfbe55f659e4b597bb81680b20db4c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625000a942ec1b76a1176284be6d6520.png)
(3)问题解决
![](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/00045940432a531a8f07034032d9248d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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2023-02-11更新
|
938次组卷
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29卷引用:贵州省贵阳市贵安区高峰中学2022-2023学年九年级上学期期中数学试题
贵州省贵阳市贵安区高峰中学2022-2023学年九年级上学期期中数学试题河南省南阳市镇平县2020-2021学年九年级上学期期中数学试题山东省济南市济南中学2021-2022学年 九年级上学期数学期中考试卷河南省郑州市中原区2022-2023学年九年级上学期期中数学试题山东省济南市天桥区2022-2023学年九年级上学期期中数学试题河南省郑州市第二中学2022-2023学年九年级上学期期中数学测试卷河南省郑州市二七区第二初级中学2022-2023学年九年级上学期期中数学试题河北省石家庄市第八十一中学2023-2024学年九年级上学期期中数学试题山东省济南市商河县四校2023-22024学年九年级上学期期中考试数学试题2020年内蒙古省包头市中考数学4月模拟试题2020年山东省济南市平阴县中考数学一模试题2020年河南省郑州市市直学校中考数学一模试题2020年山东省德州市乐陵县九年级数学中考三模试题(已下线)【万唯原创】河南省中考数学-河南缺题-类比探究中(已下线)手拉手模型山东省菏泽市单县2020-2021学年九年级下学期期中数学试题(二模)(已下线)第二十三章 图形的变换(能力提升)-2021-2022学年京改版九年级数学下册单元测试卷(已下线)专题27.17+相似三角形的性质(培优篇)(专项练习)-2021-2022学年九年级数学下册基础知识专项讲练(人教版)山东省济南市平阴县2021-2022学年九年级上学期期末数学试题(已下线)专题19 以三角形为载体的几何综合探究问题陕西省宝鸡市凤翔区2022-2023学年九年级上学期期末数学试卷2023年山东省东营市东营区实验中学(五四制)九年级中考一模数学试题(已下线)2023年陕西省延安市中考数学第一次模拟考试卷变式题21-26题(已下线)专题16 几何综合压轴-学易金卷:2023年中考数学一模试题分项汇编(山东专用)河南省驻马店市平舆县完全中学2022-2023学年九年级下学期3月月考数学试题山东省东营市广饶县李鹊镇初级中学2022-2023学年八年级下学期第二次阶段限时作业数学试题湖北省武汉市培英中学2021-2022学年九年级下学期月考数学试题(已下线)专题4.46 相似三角形几何模型(旋转模型)(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(北师大版)2024年内蒙古包头市中考数学模拟试题
5 . 如图,直线
与双曲线
交于A,B两点,已知点A的坐标为
,点B的坐标为
,直线
与x轴交于点C,与y轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/48f74f18-ada2-4f02-ab43-f9729625937a.png?resizew=145)
(1)求双曲线和直线
的解析式;
(2)若点P是第二象限内反比例函数图像上的一点,
的面积是
的面积的3倍,求点P的坐标;
(3)若点E在x轴的负半轴上,是否存在以点E,C,D为顶点构成的三角形与
相似?若存在,求出点E的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c143e0781facdd4e4b6db9854e0ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb79a1b0c6dc78e6de17de6bed477fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138506a762e636aa75a4d54f5b739b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f3ac47b0d82183263fd3236b6393b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6b1ca85ab21ca36d4e4893411119a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/48f74f18-ada2-4f02-ab43-f9729625937a.png?resizew=145)
(1)求双曲线和直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若点P是第二象限内反比例函数图像上的一点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd75d573dc396f6438b5f2ed52efc3e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a4b47633857e9262eba75f69a0d298.png)
(3)若点E在x轴的负半轴上,是否存在以点E,C,D为顶点构成的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a4b47633857e9262eba75f69a0d298.png)
您最近一年使用:0次
6 . 如图,在
中,D,E分别是
和
上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/045a2b79-a37b-4ae6-8db7-f08d4bdb581c.png?resizew=126)
(1)若
,求
的长;
(2)若
的面积为18,求
的面积.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7cffeeb073f431fc874d877d866078.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/045a2b79-a37b-4ae6-8db7-f08d4bdb581c.png?resizew=126)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea147ada4f0aefdd3808a6a1133792eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
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2022-12-12更新
|
134次组卷
|
2卷引用:贵州省贵阳市2022-2023学年九年级上学期11月期中数学试题
7 . 如图,在5×3的正方形网格中,每个小格的顶点叫做格点,B,C,D都在格点上,线段AB与CD相交于点E,
( )
![](https://img.xkw.com/dksih/QBM/2022/12/10/3127609215229952/3129139137716224/STEM/f6c422574ee647d487699a7f633e8ad7.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769195d69aa5c4740ec076b4c02c7706.png)
![](https://img.xkw.com/dksih/QBM/2022/12/10/3127609215229952/3129139137716224/STEM/f6c422574ee647d487699a7f633e8ad7.png?resizew=160)
A.2:1 | B.3:1 | C.3:2 | D.4:1 |
您最近一年使用:0次
名校
8 . 如图,一次函数
的图象与x轴交于点A,与y轴交于点B,二次函数
的图象与一次函数
的图象交于B、C两点,与x轴交于D、E两点,且D点坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/eb2d69dc-7b15-4ec9-987f-6671869501f3.png?resizew=158)
(1)求抛物线的解析式;
(2)在x轴上找一点P,使
最大,求出点P的坐标;
(3)在x轴上是否存在点P,使得
是以点P为直角顶点的直角三角形?若存在,求出点P的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e091cface0c4a22727634eb480562d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c468dc5cc34c14a188493a21019e8f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e091cface0c4a22727634eb480562d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/eb2d69dc-7b15-4ec9-987f-6671869501f3.png?resizew=158)
(1)求抛物线的解析式;
(2)在x轴上找一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c3bca346d745becb14fbfde0ed318f.png)
(3)在x轴上是否存在点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
您最近一年使用:0次
2022-12-12更新
|
512次组卷
|
4卷引用:贵州省黔东南州教学资源共建共享实验基地名校2022-2023学年九年级上学期期中数学试题
9 . 如图,
为锐角三角形,
是边
上的高,正方形
的一边
在
上,顶点H,E分别在
上.已知
,
,则这个正方形的边长是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9a415bdb7b4e1e35c18a9e53205392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8c83b688911f105cffe00d6d54eea13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b03bb56c7e76954b192bd8595a0865a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/e620b5a8-4f44-4fb3-8cb1-cb088704d0f9.png?resizew=202)
您最近一年使用:0次
2022-12-11更新
|
71次组卷
|
2卷引用:贵州省铜仁市碧江区铜仁学院附属中学2022-2023学年九年级上学期期中数学试题
10 . 如图,在平行四边形ABCD中,AC、BD相交于点O,点E是OA的中点,连接BE并延长交AD于点F,已知
,则下列结论:①
;②
;③
;④
,其中一定正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/83bee961-c385-4420-8c6f-9615cc1aead5.png?resizew=249)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d568b5d555625b60b1cb375ef44eec42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d137ad180d729cf3aa2057528510b48d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ddb6225f7636b5b3881acf87fa210b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117cb4056fcace889aa5cf47dce03f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4eadca1e53d1d3e732b3917a864fcfe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/83bee961-c385-4420-8c6f-9615cc1aead5.png?resizew=249)
A.①② | B.①③ | C.①③④ | D.②③④ |
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