名校
1 . 综合与实践
“手拉手”模型是初中几何图形的一种全等变形的重要模型,可以借助旋转和全等形的相关知识结合勾股定理等,来解决有关线段的长、角的度数等问题,在学习和生活中应用广泛,有着十分重要的地位和作用.
某校数学活动小组进行了有关旋转的系列探究:
如图①,已知
和
均是等腰直角三角形,
,且
,
,易证:
,
.
深入探究:
(1)如图②,将图①中
绕点A逆时针旋转
,连接
、
,并延长
分别与
、
相交于点
、
,求证:
,
.
解决问题:
(2)如图③,将图①中
绕点
逆时针旋转
,使
与
重合,其他条件不变,若
,
,则
_______,
_______.
拓展应用:
(3)如图④,将图①中
绕点
逆时针旋转
,连接
、
,若
,
,
,则
______,
______.(提示:求
时,可过点
作
于点
)
“手拉手”模型是初中几何图形的一种全等变形的重要模型,可以借助旋转和全等形的相关知识结合勾股定理等,来解决有关线段的长、角的度数等问题,在学习和生活中应用广泛,有着十分重要的地位和作用.
某校数学活动小组进行了有关旋转的系列探究:
如图①,已知
![](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/26813466e2ee49a493881a4384fc8748.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/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509d8dd6031dc0ef92075877e53fe201.png)
深入探究:
(1)如图②,将图①中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb1aa7bc4a01962fc1297f17fa9128f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509d8dd6031dc0ef92075877e53fe201.png)
解决问题:
(2)如图③,将图①中
![](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/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5277fa450a0c513a86a74420f8ee99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e80bb0f244f283cd4c3faf809ba488d.png)
拓展应用:
(3)如图④,将图①中
![](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/45a1ac98b67f419d0dd69f4b8126a77b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedd51383f8f047f565191b128cec637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f218914337edd06e59e75d90b777e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3783ed9a7d67f4a30bd76d369555d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3bb34308698b377df58ef5441aeec76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/2022/5/2/2970553952813056/2973013676826624/STEM/dbd43c89-2f42-4814-ad3c-6dae949f501e.png?resizew=600)
您最近一年使用:0次
2022-05-05更新
|
480次组卷
|
2卷引用:2022年黑龙江省齐齐哈尔市建华区九年级中考一模数学试题
解题方法
2 . 在△ABC中,AB=AC,点D为AB边上一动点,∠CDE=∠BAC=
,CD=ED,连接BE,EC.
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947609693601792/2951420174098432/STEM/9ae93421-74e4-4573-81cc-9fe3f602088a.png?resizew=580)
(1)问题发现:
如图①,若
=60°,则∠EBA= ,AD与EB的数量关系是 ;
(2)类比探究:
如图②,当
=90°时,请写出∠EBA的度数及AD与EB的数量关系并说明理由;
(3)拓展应用:
如图③,点E为正方形ABCD的边AB上的三等分点,以DE为边在DE上方作正方形DEFG,点O为正方形DEFG的中心,若OA=
,请直接写出线段EF的长度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947609693601792/2951420174098432/STEM/9ae93421-74e4-4573-81cc-9fe3f602088a.png?resizew=580)
(1)问题发现:
如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)类比探究:
如图②,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)拓展应用:
如图③,点E为正方形ABCD的边AB上的三等分点,以DE为边在DE上方作正方形DEFG,点O为正方形DEFG的中心,若OA=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次
2022-04-05更新
|
185次组卷
|
6卷引用:黑龙江省齐齐哈尔市梅里斯区2022-2023学年九年级上学期数学期末试题
黑龙江省齐齐哈尔市梅里斯区2022-2023学年九年级上学期数学期末试题2021年河南省南阳市淅川县九年级第一次模拟测试数学试题(已下线)专题15 几何探究题-备战2022年中考数学母题题源解密(河南专用)2022年河南省长垣市九年级中考第一次模拟考试数学试题辽宁省鞍山市第二十六中学2022-2023学年九年级上学期10月月考数学试题(已下线)猜想07 相似三角形(四种基本模型专练)-2023-2024学年九年级数学上学期期末考点大串讲(人教版)
3 . 综合与实践
问题:如图1,已知点G在正方形ABCD的对角线AC上,GE⊥BC,GF⊥CD,垂足为F.
![](https://img.xkw.com/dksih/QBM/2022/2/10/2913307214946304/2924228378902528/STEM/2f95085a71064f34b1dbf31ed03f29bd.png?resizew=383)
证明与推断
(1)①四边形CEGF的形状是 ;②
的值为 ;
【探究与证明】
(2)在图1的基础上,将正方形CEGF绕点C按顺时针方向旋转α角(0°<α<45°),如图2所示,试探究线段AG与BE之间的数量关系,并说明理由;
【拓展与运用】
(3)如图3,在(2)的条件下,正方形CEGF在旋转过程中,AG和GE的位置关系是 .
问题:如图1,已知点G在正方形ABCD的对角线AC上,GE⊥BC,GF⊥CD,垂足为F.
![](https://img.xkw.com/dksih/QBM/2022/2/10/2913307214946304/2924228378902528/STEM/2f95085a71064f34b1dbf31ed03f29bd.png?resizew=383)
证明与推断
(1)①四边形CEGF的形状是 ;②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ec2c1bca9d89d16df525a45408aa76.png)
【探究与证明】
(2)在图1的基础上,将正方形CEGF绕点C按顺时针方向旋转α角(0°<α<45°),如图2所示,试探究线段AG与BE之间的数量关系,并说明理由;
【拓展与运用】
(3)如图3,在(2)的条件下,正方形CEGF在旋转过程中,AG和GE的位置关系是 .
您最近一年使用:0次
4 . 如图,在
中,AB=AC,E是线段BC上一动点(不与B、C重合),连接AE,将线段AE绕点A逆时针旋转与
相等的角度,得到线段AF,连接
.点
和点
分别是边
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/7c58833d-17da-4a69-9182-fb6f8b868ea7.png?resizew=444)
(1)【问题发现】如图1,若
,当点E是
边的中点时,
____,直线
与
相交所成的锐角 的度数为______度.
(2)【解决问题】如图2,若
,当点E是
边上任意一点时(不与B、C重合),上述两个结论是否成立?若成立,请写出证明过程;若不成立,请说明理由.
(3)【拓展探究】如图3,若
,AB=6,
,在E点运动的过程中,直接写出GN的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/7c58833d-17da-4a69-9182-fb6f8b868ea7.png?resizew=444)
(1)【问题发现】如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3cf42a8dc862fbb78d6a780c420b24a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a3464e90637e0fe75461c44096e746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)【解决问题】如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3cf42a8dc862fbb78d6a780c420b24a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)【拓展探究】如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49938ca6628df6a0e2f71434802990b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336cf2082c1f8d6a97ca630c9e5b45f1.png)
您最近一年使用:0次
2022-04-07更新
|
532次组卷
|
7卷引用:2022年黑龙江省齐齐哈尔市泰来县第二中学中考模拟数学试题
5 . 实践与探究
情境:在正方形ABCD中,AB=5,点F在AC上,且
,过点F作EF⊥AC,交CD于点E,连接AE,AF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/283b2502-36ec-4081-9201-5dbd18fb421b.png?resizew=415)
(1)问题发现
图(1)中,线段AE与BF的数量关系是______;
直线AE与直线BF的夹角的度数是______.
(2)问题拓展
当△CEF绕点C顺时针旋转时,(1)中的结论是否成立?若成立,请仅就图2的情形给出证明;若不成立,说明理由.
(3)问题延伸
在(2)的条件下,当点F到直线BC的距离为2时,直接写出AE的长.
情境:在正方形ABCD中,AB=5,点F在AC上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da8046ae7d118efabe9e2fbadcfe92d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/283b2502-36ec-4081-9201-5dbd18fb421b.png?resizew=415)
(1)问题发现
图(1)中,线段AE与BF的数量关系是______;
直线AE与直线BF的夹角的度数是______.
(2)问题拓展
当△CEF绕点C顺时针旋转时,(1)中的结论是否成立?若成立,请仅就图2的情形给出证明;若不成立,说明理由.
(3)问题延伸
在(2)的条件下,当点F到直线BC的距离为2时,直接写出AE的长.
您最近一年使用:0次
2022-04-08更新
|
730次组卷
|
3卷引用:2022年黑龙江省齐齐哈尔市中考适应性模拟数学试题
6 . 综合与实践
综合与实践上,老师组织同学们以“正方形的旋转”为主题开展数学活动,“智慧小组”选行了下面的探究:已知正方形
与正方形
,正方形
保持不变,正方形
绕点
旋转一周.
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948789668626432/2950972348358656/STEM/cf4e1681-536e-4a21-9064-38c8064257cc.png?resizew=564)
(1)操作发现:
当点
在正方形
的边
上时,如图①所示,连接
、
,若
,
,则
的值为__________;
(2)探究证明:
当正方形
旋转至图②的位置时,连接
、
,试写出
与
的数量关系,并加以证明;
(3)拓展延伸:
连接
、
,分别取
、
的中点
、
,连接
,
,当正方形
绕点
旋转一周时,请直接写出线段
所扫过的面积.
综合与实践上,老师组织同学们以“正方形的旋转”为主题开展数学活动,“智慧小组”选行了下面的探究:已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948789668626432/2950972348358656/STEM/cf4e1681-536e-4a21-9064-38c8064257cc.png?resizew=564)
(1)操作发现:
当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](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/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af4ea989fa0a89c7fef51255a92116b.png)
(2)探究证明:
当正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
(3)拓展延伸:
连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb6823a329628699619a39cde927510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
您最近一年使用:0次
2022-04-04更新
|
272次组卷
|
4卷引用:2022年黑龙江省齐齐哈尔市铁锋区中考一模数学试题
2022年黑龙江省齐齐哈尔市铁锋区中考一模数学试题2022年黑龙江省齐齐哈尔市铁锋区九年级下学期一模数学试题(已下线)押江苏南京中考数学第27题(几何综合与探究)-备战2022年中考数学临考题号押题(江苏南京专用)(已下线)必刷卷05-2022年中考数学考前信息必刷卷(安徽专用)
名校
7 . 综合与实践
如图1,已知点G在正方形ABCD的对角线AC 上,GE⊥BC,垂足为E,GF⊥CD,垂足为F.
![](https://img.xkw.com/dksih/QBM/2021/11/25/2858782950957056/2860295926038528/STEM/259b9cd2-e7cb-4fcf-adc4-4f7794453c94.png?resizew=465)
【证明与推断】
(1)①四边形CEGF的形状是______________;
②
的值为_______________;
【探究与证明】
(2)在图1的基础上,将正方形CEGF绕点C按顺时针方向旋转α角(0°<α<45°),如图2所示,试探究线段AG与BE之间的数量关系,并说明理由;
【拓展与运用】
(3)如图3,在(2)的条件下,正方形CEGF 在旋转过程中,当B、E、F三点共线时,探究AG和GE的位置关系,并说明理由.
如图1,已知点G在正方形ABCD的对角线AC 上,GE⊥BC,垂足为E,GF⊥CD,垂足为F.
![](https://img.xkw.com/dksih/QBM/2021/11/25/2858782950957056/2860295926038528/STEM/259b9cd2-e7cb-4fcf-adc4-4f7794453c94.png?resizew=465)
【证明与推断】
(1)①四边形CEGF的形状是______________;
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ec2c1bca9d89d16df525a45408aa76.png)
【探究与证明】
(2)在图1的基础上,将正方形CEGF绕点C按顺时针方向旋转α角(0°<α<45°),如图2所示,试探究线段AG与BE之间的数量关系,并说明理由;
【拓展与运用】
(3)如图3,在(2)的条件下,正方形CEGF 在旋转过程中,当B、E、F三点共线时,探究AG和GE的位置关系,并说明理由.
您最近一年使用:0次
2021-11-27更新
|
593次组卷
|
11卷引用:黑龙江省齐齐哈尔市铁锋区2021-2022学年九年级上学期期末数学试题1
黑龙江省齐齐哈尔市铁锋区2021-2022学年九年级上学期期末数学试题1山西省晋中市祁县、灵石县2021-2022学年九年级上学期期中考试数学试题山西省晋中市灵石县2021-2022学年九年级上学期期中数学试题2022年江西省新余市中考第一次模拟数学试题江西省抚州市乐安县2021-2022学年九年级下学期期中数学试题(一模)江西省吉安市思源实验学校2021-2022学年九年级下学期期中考试数学试卷(已下线)黄金卷04-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(江西专用)2023年江西省赣州市会昌县中考模拟数学试题河南省平顶山市叶县2023-2024学年九年级上学期期中数学试题江西省宜春市丰城中学2023-2024学年九年级上学期月考数学试题2023年山东省泰安市宁阳县中考数学一模试题
8 . 综合与实践
动手实践:一次数学兴趣活动,张老师将等腰
的直角顶点
与正方形
的顶点
重合(
),按如图(1)所示重叠在一起,使点
在
边上,连接
.
![](https://img.xkw.com/dksih/QBM/2021/5/23/2727251696304128/2731376576405504/STEM/c52199ab-7fba-483d-bc88-09988c881b3f.png?resizew=491)
则可证:
______,______三点共线;
发现问题:(1)如图(2),已知正方形
,
为
边上一动点,
,
交
的延长线于
,连结
交
于点
.
若
,则
______,
______;
尝试探究:(2)如图(3),在(1)的条件下若
,求证:
;
拓展延伸:(3)如图(4),在(1)的条件下,当
______时,
为
的6倍(直接写结果,不要求证明).
动手实践:一次数学兴趣活动,张老师将等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf034d60402658fde0ac001ffa8a277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4687edef88860666c2833a3c50f02a66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/2021/5/23/2727251696304128/2731376576405504/STEM/c52199ab-7fba-483d-bc88-09988c881b3f.png?resizew=491)
则可证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ced51cf5d8b8ac1cf1307fc40725d34.png)
发现问题:(1)如图(2),已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f064a82701e492f01f5b7e25862c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ed934aa29859e93b1f758229a12581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09936c755d2a30ae65887c442b96ab21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d3d6a1d86ba91bbf00687c161eefa3.png)
尝试探究:(2)如图(3),在(1)的条件下若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b87cc087fa92d8796dbda48486152518.png)
拓展延伸:(3)如图(4),在(1)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
您最近一年使用:0次
解题方法
9 . 综合与实践
动手操作
利用旋转开展教学活动,探究图形变换中蕴含的数学思想方法.
如图1,将等腰直角三角形
的
边绕点
顺时针旋转90°得到线段
,
,
,连接
,过点
作
交
延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/e2ba450d-3f60-4574-a821-0a3dfff6b4da.png?resizew=630)
思考探索
(1)在图1中:
①求证:
;
②
的面积为______;
③
______.
拓展延伸
(2)如图2,若
为任意直角三角形,
.
、
、
分别用
、
、
表示.请用
、
、
表示:
①
的面积:______;
②
的长:______;
(3)如图3,在
中,
,
,
,
,
,连接
.
①
的面积为______;
②点
是
边的高上的一点,当
______时,
有最小值______.
动手操作
利用旋转开展教学活动,探究图形变换中蕴含的数学思想方法.
如图1,将等腰直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19a6e91938fd1e4de242717fd5108c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/e2ba450d-3f60-4574-a821-0a3dfff6b4da.png?resizew=630)
思考探索
(1)在图1中:
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ef29b2ad2766db967bd83be7980055.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2df93bd15f25096c510b589aad0dfc1.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ba106bbab6767576439b7a5ccfd492.png)
拓展延伸
(2)如图2,若
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2df93bd15f25096c510b589aad0dfc1.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
(3)如图3,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/f2212db470de13d686a921bc7da751f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae6457ac54bcdcf5d67f4271127b1555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2df93bd15f25096c510b589aad0dfc1.png)
②点
![](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/d9f63d194aa0d4091618b6f41f569ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e055d012a9b8f2d3274a397270c51aa8.png)
您最近一年使用:0次
真题
10 . 在
中,
,
,
是边
上一点,将
沿
折叠得到
,连接
.
(1)特例发现:如图1,当
,
落在直线
上时,
①求证:
;
②填空:
的值为______;
(2)类比探究:如图2,当
,
与边
相交时,在
上取一点
,使
,
交
于点
.探究
的值(用含
的式子表示),并写出探究过程;
(3)拓展运用:在(2)的条件下,当
,
是
的中点时,若
,求
的长.
![](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/62619f5ef98b1c24b10b9f66153f09d3.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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(1)特例发现:如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8657c9063fed8b1d90c37f9fea4e92.png)
②填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b0fc5e1be2540f5cfe02424ab25df15.png)
(2)类比探究:如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060e7930731eddbcfac592b808e9b698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f6e720760fc6c81d4005f641460405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e0eb1703779b7574605f3f60fa83fbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)拓展运用:在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4875f6b13d20d1389a26ad77cca5bd00.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/5a7d110c58d3f425774da8edd53d4c4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/2021/7/1/2754678279872512/2754876424511488/STEM/7c918aba-aea9-4052-af66-e5090c3e1a2d.png)
您最近一年使用:0次
2021-07-01更新
|
1707次组卷
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13卷引用:黑龙江省哈尔滨市香坊区香远中学2023-2024学年九年级上学期期中数学(五四制)试题
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