1 . 初步探究
(1)如图1,在四边形
中,
相交于点O,
,且
,则
与
的数量关系为 .
迁移探究
(2)如图2,在四边形
中,
相交于点O,
,(1)中
与
的数量关系还成立吗?如果成立,请说明理由.
拓展探究
(3)如图3,在四边形
中,
相交于点O,
,且
,求
的长.
(1)如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ef285d0b087b41d8f744108b546d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208f155347298c2ad3949346c85aa504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
迁移探究
(2)如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ef285d0b087b41d8f744108b546d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
拓展探究
(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/664f0d25799bef33c02205693f7be08c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cafc1c92f49c99862f4b1701f188562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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名校
2 . (1)【探究发现】如图①,已知矩形
的对角线
的垂直平分线与边
,
分别交于点E,F.求证:四边形
是菱形;
分别交矩形
的边
,
于点E,F,将矩形
沿
翻折,使点C的对称点与点A重合,点D的对称点为
,若
,
,求四边形
的周长;
(3)【拓展延伸】如图③,直线
分别交平行四边形
的边
,
于点E,F,将平行四边形
沿
翻折,使点C的对称点与点A重合,点D的对称点为
,若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/9766e5eb6796dafc5ffe212afdfc43c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
(3)【拓展延伸】如图③,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b173ac8cc4ac4f1c9e1daaa605fbb27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
2024-04-05更新
|
682次组卷
|
22卷引用:江西省南昌市一中教育集团2023-2024学年八年级下学期期中数学试题
江西省南昌市一中教育集团2023-2024学年八年级下学期期中数学试题甘肃省武威市武威第十中学2023-2024学年九年级下学期第一次月考数学试题(已下线)专题17八年级期中压轴题精选-【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(人教版,湖北专用)(已下线)名校期中好题汇编(人教版八年级数学下册):专题四——特殊平行四边形(已下线)考前特训03 几何解答题探究综合压轴题-2024年中考数学二轮热点题型归纳与变式演练(全国通用)江苏省南通市如东县2023-2024学年八年级下学期期中数学试题广东省江门市福泉奥林匹克学校2023-2024学年八年级下学期期中数学试题(已下线)专题06四边形折叠问题与最值问题(优选33道)-【好题汇编】备战2023-2024学年八年级数学下学期期末真题分类汇编(湖北专用)(已下线)专题05特殊的平行四边形(六大题型优选50道)-【好题汇编】备战2023-2024学年八年级数学下学期期末真题分类汇编(湖北专用)(已下线)2023—2024学年名校期末好题汇编(人教版八年级数学下册)——专题四—特殊的平行四边形湖北省襄阳市枣阳市2021-2022学年八年级下学期期末数学试题江苏省南通市海安市西片联盟2022-2023学年八年级下学期期中数学试题2023年山东省青岛第二十六中学中考二模数学试题(已下线)八年级下学期数学期末质量检测B卷(测试范围:八下全部内容)-【单元测试】2022-2023学年八年级数学下册分层训练AB卷(人教版)湖北省利川市五校教联体2022-2023学年八年级下学期期中数学试题湖北省黄石市四区2022--2023学年八年级下学期期末数学试题(已下线)2023年青岛二模(探究拓展题)湖北省武汉市湖北大学附属中学2023-2024 学年九年级上学期月考数学试题湖北建始县官店镇民族中学2023-2024学年九年级上学期月考数学试题广东省佛山市三水区西南中学2023-2024学年九年级上学期第一次月考数学试题2023年四川省绵阳市涪城区中考模拟预测九年级数学模拟预测题2023年四川省绵阳市涪城区中考数学终极模拟预测题(6月份)
名校
3 . 课本再现:
(1)在图1中,一块材料的形状是锐角三角形
,边
,高
.把它加工成正方形零件,使正方形的一边在
上,其余两个顶点分别在
上,求这个正方形的边长.
变式探究:
(2)如图2,若一块三角形材料可以加工成3个相同大小的正方形零件,请你探究
与
的数量关系,并说明理由.
拓展延伸:
(3)如图3,若一块三角形材料可以加工成4个相同大小的正方形零件,且
,请你探究
的值.
(4)如图4,若一块三角形材料用同样的方式,可以加工成
个相同大小的正方形零件,设每个正方形的边长为a,则
.(用含a,n的代数式表示,直接写出结果)
(1)在图1中,一块材料的形状是锐角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804cd8843150965cb8a0613ff243b9a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd592ad6bffa2ae5c10da819469733b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
变式探究:
(2)如图2,若一块三角形材料可以加工成3个相同大小的正方形零件,请你探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
拓展延伸:
(3)如图3,若一块三角形材料可以加工成4个相同大小的正方形零件,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882f6fe6d8d03466a1330717c983c4f0.png)
(4)如图4,若一块三角形材料用同样的方式,可以加工成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df98a2c4252e3b4e0397b4537da03edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/a778be5a-2189-475e-b34e-7e053277bec7.png?resizew=433)
您最近一年使用:0次
2024-02-25更新
|
79次组卷
|
2卷引用:江西省南昌市外国语学校2023-2024学年九年级上学期期末数学试题
4 . 【感知】
如图1,在四边形
中,
,且
.求证:
.
【探究】
如图2,在四边形
中,
,且
,点
在边
的延长线上,连接
,以
为直角边作等腰直角
,过点
作
,垂足为
,连接
交
于点
.求证:
.
【拓展】
如图3,点
在四边形
内,
,且
,
,过点
作
交
于点
,使
,延长
交
于点
.试探究
与
之间的数量关系,并说明理由.
如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47da0eaba3e7747d69fd29ac7a0134a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b0e5eeb1ecb6e71b7e497c971863c8.png)
【探究】
如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47da0eaba3e7747d69fd29ac7a0134a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffd99c41dce8e389101c9714ad05880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051ccb67b655ffc01e717109602d92b8.png)
【拓展】
如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a35656396822583224ba53e940df78c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0487ebca22d4aa1233073f81fd70a424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f30f3e9557b959b418804ac59f31a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/9e7be85a-1480-420b-9468-9038afabc9cb.png?resizew=483)
您最近一年使用:0次
5 . 【问题背景】如图,正方形
的对角线相交于点O,点O又是正方形
的一个顶点,而且这两个正方形的边长相等,无论正方形
绕点O怎样转动,两个正方形重叠部分的面积,总等于一个正方形面积的
,九年级数学兴趣小组对上面的问题又进行了拓展探究、内容如下:正方形
的对角线相交于点O,点P落在线段
上,
(k为常数).
(1)如图1,将
的直角顶点P与点O重合,两直角边分别与边
,
相交于点M,N.
①填空:
______;
②求证:
.
【类比探究】
(2)如图2,将图1中的
沿
方向平移,判断
与
的数量关系(用含k的式子表示),并说明理由.
【拓展运用】
(3)如图3,点N在边
上,
,延长
交边
于点E,若
,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4635a4e561d862638f6818e85e74bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4635a4e561d862638f6818e85e74bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d52f125abf9625888d5feb7d6d2b5fd7.png)
(1)如图1,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d244880e9a28a02df25b4e864b28975e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4acd79bb9fb06f7c806eb6e17e4b613.png)
【类比探究】
(2)如图2,将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
【拓展运用】
(3)如图3,点N在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f27564bb46555b27e130fe9aad7615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f3d9105c0a55832a1ba674ec12364b1.png)
您最近一年使用:0次
名校
6 . 某研究性学习小组在探究矩形的折纸问题时,将一块直角三角板的直角顶点绕矩形
(
)的对角线的交点
旋转(![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef73aff3fe470e367f4af24fdfff3df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef73aff3fe470e367f4af24fdfff3df.png)
),图中的
分别为直角三角形的直角边与矩形
的边
的交点.
解决问题:(
)该学习小组成员意外的发现图
(三角板一直角边与
重合)中,此时发现
这三条线段之间满足以下的数量关系:
;在图
中(三角板一边与
重合),
,请你对这名成员在图
和图
中发现的结论选择其一说明理由.
)在图
中(三角板一边与
重合),直接写出
这三条线段之间所满足的数量关系 .
在图
中,试探究
这四条线段之间的数量关系,写出你的结论,并说明理由.
拓展延伸:(
)将矩形
改为边长为
的正方形
,直角三角板的直角顶点绕
点旋转到图
,两直角边与
,
分别交于
,直接写出
这四条线段之间所满足的数量关系.(不需要证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09a9a6f020159406608000cf93d4fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef73aff3fe470e367f4af24fdfff3df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef73aff3fe470e367f4af24fdfff3df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eceff9b68796f5ccd4daa4028e3a182.png)
解决问题:(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b81cfd2a2d61cd1f8e915788273e59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b53802815a157146fc5c4ea1530903e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3341653861e0363f166435ad8106324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b81cfd2a2d61cd1f8e915788273e59f.png)
在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8443063f61fc96e23d25ae5e6754017.png)
拓展延伸:(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8b8edd94bc4d5d517ec77e56800e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8443063f61fc96e23d25ae5e6754017.png)
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7 . 【课例改编】
数学课上,张老师根据数学课本习题改编了一个题目:如图,
是
的高,
,若
,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/69570adb-f3d8-4a72-b25a-459eb3f61801.png?resizew=179)
小明同学的想法是利用构造全等三角形来解决:将
沿
折叠,如图1,则点
刚好落在
边上的点
处.……
(1)结合小明同学的想法,请直接写出:
_____.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/f6c396b9-2ba8-45ef-b4d1-c5a17d2df8f4.png?resizew=177)
【改编拓展】
张老师继续启发同学们改编此题,得到下列试题,请同学们解答:
(2)如图2,
为
的外角
的平分线,交
的延长线于点
,则线段
有什么数量关系?请写出你的猜想并证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/bf43183d-9280-44c4-8d08-f66bf4ceb32d.png?resizew=170)
【模型应用】
根据上面探究构造全等模型的规律,请解答:
(3)如图3,在四边形
中,
平分
,求
的长.
数学课上,张老师根据数学课本习题改编了一个题目:如图,
![](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/1c9af7ab732d431dd78e84db9586d3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fb8f8236e1c649fac70e7b08343145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/69570adb-f3d8-4a72-b25a-459eb3f61801.png?resizew=179)
小明同学的想法是利用构造全等三角形来解决:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)结合小明同学的想法,请直接写出:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/f6c396b9-2ba8-45ef-b4d1-c5a17d2df8f4.png?resizew=177)
【改编拓展】
张老师继续启发同学们改编此题,得到下列试题,请同学们解答:
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd13d5c5788196f332fe53f85a0ad86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db0641078052bf1af17b4c5a01b9ccc.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/9ec863999b1974aabb6dc67841765161.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/bf43183d-9280-44c4-8d08-f66bf4ceb32d.png?resizew=170)
【模型应用】
根据上面探究构造全等模型的规律,请解答:
(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ecf6fbd7efd5867cbff635bea788a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/12641f29-772f-4421-b354-5e58f726c3b8.png?resizew=168)
您最近一年使用:0次
2024-01-27更新
|
236次组卷
|
2卷引用:江西省赣州市章贡区2023-2024学年八年级上学期期末数学试题
8 . 综合与实践
李老师善于通过合适的主题整合教学内容,帮助同学们用整体的、联系的、发展的眼光看问题,形成科学的思维习惯.下面是李老师在“相似”主题下设计的问题,请你解答
【问题情境】
在中,
是
边上一点,
,
与
交于点
.
【初步探究】
(1)如图1,若,
于点
.
①求证.
②求的值.
【拓展延伸】
(2)如图2,是
延长线上一点,若
已知
,求
的长
您最近一年使用:0次
2024-01-06更新
|
198次组卷
|
3卷引用:江西省2023-2024学年九年级上学期期末数学试题
9 . 如图在正方形
中,E是对角线
上的一动点(不与点B,D重合),连接
,过点E作
交射线
于点F,接
.
上时,
和
的数量关系是 .
(2)探究问题:如图2当点F落在边
的延长线上时,(1)中的结论是否成立?请判断并说明理由.
(3)拓展应用:当点E在射线
上运动,且
时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/40fe2cc764de5fa58e9d90d750c5c528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)探究问题:如图2当点F落在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)拓展应用:当点E在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53443fbe73308c18147eb5e88825c223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
您最近一年使用:0次
真题
10 . 【问题背景】
人教版八年级下册数学教材第63页“实验与探究”问题1如下:如图,正方形
的对角线相交于点
,点
又是正方形
的一个顶点,而且这两个正方形的边长相等,无论正方形
绕点
怎样转动,两个正方形重叠部分的面积,总等于一个正方形面积的
.想一想,这是为什么?(此问题不需要作答)
九年级数学兴趣小组对上面的问题又进行了拓展探究、内容如下:正方形
的对角线相交于点
,点
落在线段
上,
(
为常数).
(1)如图1,将
的直角顶点
与点
重合,两直角边分别与边
,
相交于点
,
.
①填空:
______;
②求证:
.(提示:借鉴解决【问题背景】的思路和方法,可直接证明
;也可过点
分别作
,
的垂线构造全等三角形证明.请选择其中一种方法解答问题②.)
【类比探究】
(2)如图2,将图1中的
沿
方向平移,判断
与
的数量关系(用含
的式子表示),并说明理由.
【拓展运用】
(3)如图3,点
在边
上,
,延长
交边
于点
,若
,求
的值.
人教版八年级下册数学教材第63页“实验与探究”问题1如下:如图,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e2699bbd62cf03b5f1eaae984287d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e2699bbd62cf03b5f1eaae984287d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
九年级数学兴趣小组对上面的问题又进行了拓展探究、内容如下:正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d52f125abf9625888d5feb7d6d2b5fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(1)如图1,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d244880e9a28a02df25b4e864b28975e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
①填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4acd79bb9fb06f7c806eb6e17e4b613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3304c41b7ef6d6f43ec3090c5362f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
【类比探究】
(2)如图2,将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
【拓展运用】
(3)如图3,点
![](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/f3f27564bb46555b27e130fe9aad7615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f3d9105c0a55832a1ba674ec12364b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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9卷引用:2024年江西省九江市第十一中学中考一模数学试题
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