1 . 在△AOB和△COD中,
,连接BD,AC,直线BD交AC于点E,交OA于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/4c84e55c-32bb-47dd-a4a5-85a1e5024513.png?resizew=658)
(1)特例发现:如图1,若OA=OB,OC=OD.推断:
①
____________;
②
的度数为_________.
(2)探究证明:如图2,若
.判断
的值及
的度数,并说明理由.
(3)拓展延伸:在(2)的条件下:若
,
,
①将△OCD绕点O顺时针旋转,使点
与点E第一次重合,如图3,此时
,求
的长;
②在点
与点E第一次重合后,若将①中得到的△OCD继续顺时针旋转,当点D在△AOB内部时,如图4,线段BE的长度是否存在最大值?若存在,直接写出最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd660176e4affe9597294b01d1767fca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/4c84e55c-32bb-47dd-a4a5-85a1e5024513.png?resizew=658)
(1)特例发现:如图1,若OA=OB,OC=OD.推断:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5510b793f980a1bafa919abff54281.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6282292819434a8905a212427613fd85.png)
(2)探究证明:如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e017b396ac697d90a5831f9cd4a8424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78c44f837a63101c19745cc1a79a740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6282292819434a8905a212427613fd85.png)
(3)拓展延伸:在(2)的条件下:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434845564fd5765244f8d1aa9240fa39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03f416cb4d50a5f473df4bbceeb3094.png)
①将△OCD绕点O顺时针旋转,使点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8512696389a9cd69ad58ad2c5adc857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
②在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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2 . 已知:如图1所示,将一块等腰三角板BMN放置与正方形ABCD的∠B重合,连接AN,CM,E是AN的中点,连接BE,BE与MC交于点F.
![](https://img.xkw.com/dksih/QBM/2022/3/26/2944262361563136/2967189486780416/STEM/f401dc3e-ee03-413f-ab5f-d6f1e842a816.png?resizew=676)
(1) [观察猜想]CM与AN的数量关系是________,CM与BE的数量关系是________,CM与BE的位置关系是________;
(2) [探究证明]如图2所示,把三角板BMN绕点B逆时针旋转α(0°<α<90°),其他条件不变,线段CM与BE的关系是否仍然成立,并说明理由;
(3) [拓展延伸]若旋转角α=45°,且∠NBE=2∠ABE,求
的值.
![](https://img.xkw.com/dksih/QBM/2022/3/26/2944262361563136/2967189486780416/STEM/f401dc3e-ee03-413f-ab5f-d6f1e842a816.png?resizew=676)
(1) [观察猜想]CM与AN的数量关系是________,CM与BE的数量关系是________,CM与BE的位置关系是________;
(2) [探究证明]如图2所示,把三角板BMN绕点B逆时针旋转α(0°<α<90°),其他条件不变,线段CM与BE的关系是否仍然成立,并说明理由;
(3) [拓展延伸]若旋转角α=45°,且∠NBE=2∠ABE,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3cd6a673d7e238ebb769839b6317a9.png)
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真题
名校
3 . 如图,
和
的顶点
重合,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/27/c39e9ff7-2ee3-4cfa-a6e8-d0d56ef713cc.png?resizew=144)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/27/4012fd1d-f51d-4836-baa4-5afc69cb3f4d.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/27/a20928fb-5c61-40df-bf24-f6d9e56e9c4b.png?resizew=155)
(1)特例发现:如图1,当点
,
分别在
,
上时,可以得出结论:
______,直线
与直线
的位置关系是______;
(2)探究证明:如图2,将图1中的
绕点
顺时针旋转,使点
恰好落在线段
上,连接
,(1)中的结论是否仍然成立?若成立,请证明;若不成立,请说明理由;
(3)拓展运用:如图3,将图1中的
绕点
顺时针旋转
,连接
、
,它们的延长线交于点
,当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ae31b70c84b0c8bf215843182a8c66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f656312c3dae073382fe9e576f6179f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/27/c39e9ff7-2ee3-4cfa-a6e8-d0d56ef713cc.png?resizew=144)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/27/4012fd1d-f51d-4836-baa4-5afc69cb3f4d.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/27/a20928fb-5c61-40df-bf24-f6d9e56e9c4b.png?resizew=155)
(1)特例发现:如图1,当点
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b85cfaafce8f597ca12c6fa209df019a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)探究证明:如图2,将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
(3)拓展运用:如图3,将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a906b77dd91b2ee627116177376546.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f40b3bf6b27f936e0747de92151a1f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ce6d51e96ff96a1f0121e57c852317.png)
您最近一年使用:0次
2022-06-26更新
|
1653次组卷
|
9卷引用:2022年湖南省岳阳市中考数学真题
2022年湖南省岳阳市中考数学真题湖南省岳阳市弘毅新华中学2023-2024年九年级上学期期中数学试题(已下线)专题15 相似三角形-2022年中考数学真题分项汇编(全国通用)(第1期)(已下线)第五节 图形的旋转与位似01技法提练(已下线)黄金卷06-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(湖北武汉专用)2023年山西省晋中市平遥县中考一模数学试卷2023年山西省晋中市平遥县中考一模数学试卷(已下线)2023年河南省驻马店市八校联考中考二模数学试题变式题21-23题(已下线)2023年山西一模(几何综合)
4 . 阅读材料:三角形的三条中线必交于一点,这个交点称为三角形的重心.
的重心为点O,则
的面积为 ;
(2)性质探究:如图(2),已知
的重心为点O,对于任意形状的
,
是不是定值,如果是,请求出定值为多少,如果不是,请说明理由;
(3)性质应用:如图(3),在任意矩形
中,点E是
的中点,连接
交对角线
于点M,
的值是不是定值,如果是,请求出定值为多少,如果不是,请说明理由;
(4)思维拓展:如图(4),
,N点的坐标为
,M点的坐标为
,点Q在线段
上以每秒1个单位的速度由O向M点移动,当Q运动到M点就停止运动,连接
,将
分为
和
两个三角形,当其中一个三角形与原
相似时,求点Q运动的时间t.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
(2)性质探究:如图(2),已知
![](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/592cc9d735b0519cadec6d52da441c0a.png)
(3)性质应用:如图(3),在任意矩形
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78ebb0d1b08c5c2f05a9dd16d90bee58.png)
(4)思维拓展:如图(4),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef72d3c856fc2600dc1689ef670f256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b78ae869845f55762c3c9605714fd71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e792accdcc7113caab88bb6cef37158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a95ec3bb06756f0b4f047282de02bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b447109d096ac7f01824b26cf94da279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
您最近一年使用:0次
2022-12-16更新
|
204次组卷
|
3卷引用:湖南省永州市冷水滩区京华中学2022-2023学年九年级数学上学期第三次月考综合测试题
5 . 根据已知图形解答下列问题.
(1)问题发现
如图1,A、B、C、D四家工厂分别坐落在正方形城镇的四个角上,仓库P和Q分别位于AD和DC上,且两条直路BP⊥AQ.试判断的BP与AQ数量关系.并说明理由.
(2)类比探究
如图2,在矩形ABCD中,AB=6,AD=9.点P在边AD上,连接BP,过点A作AQ⊥BP于点M,交射线DC于点Q.求
的值.
(3)拓展延伸
如图3,在三角形ABD中,∠BAD=90°,AB=6,AD=9,P是AD边上一动点,Q是BD边上一动点,且
=
,当BP⊥AQ时,AP= .
(1)问题发现
如图1,A、B、C、D四家工厂分别坐落在正方形城镇的四个角上,仓库P和Q分别位于AD和DC上,且两条直路BP⊥AQ.试判断的BP与AQ数量关系.并说明理由.
(2)类比探究
如图2,在矩形ABCD中,AB=6,AD=9.点P在边AD上,连接BP,过点A作AQ⊥BP于点M,交射线DC于点Q.求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5efbe22e436e058ea0ea846c705d0887.png)
(3)拓展延伸
如图3,在三角形ABD中,∠BAD=90°,AB=6,AD=9,P是AD边上一动点,Q是BD边上一动点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9ec3bea6034ced953fcca65bb1a2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76970944075a44f9949b7f0cb7084f25.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/893a4269-8cd3-4f02-a2e8-c8aa037c0af5.png?resizew=154)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/1b10f46b-952c-46e8-ba1c-bb714099e819.png?resizew=166)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/40cd1e5b-1610-4ac0-bfc6-c37099cc4aaa.png?resizew=168)
您最近一年使用:0次
2021-10-27更新
|
407次组卷
|
2卷引用:湖南省常德市武陵区2021-2022学年九年级上学期七年级期末数学试卷
真题
6 . 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
|
13卷引用:2022年湖南省岳阳市初中毕业学业水平考试模拟数学试题(三)
2022年湖南省岳阳市初中毕业学业水平考试模拟数学试题(三)湖北省襄阳市2021年中考数学真题2022年安徽省滁州市凤阳县中考一模统考数学试题2022年安徽省天长市中考第一次模拟考试数学试题2022年湖北省孝感市汉川市四校联考三月份中考数学模拟试题2022年内蒙古赤峰市初中毕业、升学仿真模拟数学试题(二)(已下线)专题33 阅读理解探究题压轴题-备战2022年中考数学临考题号押题(全国通用)(已下线)专题07 几何图形的性质-5年(2018-2022)中考1年模拟数学分项汇编(安徽专用)2022年安徽省滁州市定远县中考数学一模试卷2023年安徽省黄山市中考二模数学试题(已下线)专题16 图形的旋转(真题3个考点模拟10个考点) -学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(安徽专用)(已下线)2023年安徽二模几何综合1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
真题
名校
7 . (1)阅读理解:我国是最早了解勾股定理的国家之一,它被记载于我国古代的数学著作《周髀算经》中.汉代数学家赵爽为了证明勾股定理,创制了一幅如图①所示的“弦图”,后人称之为“赵爽弦图”.根据“赵爽弦图”写出勾股定理和推理过程;
(2)问题解决:勾股定理的证明方法有很多,如图②是古代的一种证明方法:过正方形
的中心
,作
,将它分成4份.所分成的四部分和以
为边的正方形恰好能拼成以
为边的正方形.若
,求
的值;
(3)拓展探究:如图③,以正方形一边为斜边向外作直角三角形,再以该直角三角形的两直角边分别向外作正方形,重复这一过程就可以得到“勾股树”的部分图形.设大正方形
的边长为定值
,小正方形
的边长分别为
.已知
,当角
变化时,探究
与
的关系式,并写出该关系式及解答过程(
与
的关系式用含
的式子表示).
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754029897998336/2754645596610560/STEM/282c805a-e46d-4e82-a926-71a5009fa02a.png?resizew=139)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754029897998336/2754645596610560/STEM/fdee8d91-425c-42b5-b0d5-7d7a232ca625.png?resizew=177)
(2)问题解决:勾股定理的证明方法有很多,如图②是古代的一种证明方法:过正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db47044a8f613938494297a4b7f5c761.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/16bd841d4ebb575532f7bff223cd72a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)拓展探究:如图③,以正方形一边为斜边向外作直角三角形,再以该直角三角形的两直角边分别向外作正方形,重复这一过程就可以得到“勾股树”的部分图形.设大正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d10449bc77d692a7270e0f20a68cdf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e121beb1d5d5d2e66a3d84958b033ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b40aa8d2482d698ebef69cf225f99f8.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/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754029897998336/2754645596610560/STEM/282c805a-e46d-4e82-a926-71a5009fa02a.png?resizew=139)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754029897998336/2754645596610560/STEM/fdee8d91-425c-42b5-b0d5-7d7a232ca625.png?resizew=177)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754029897998336/2754645596610560/STEM/b3097efe-d0d8-411d-b983-8a6f49a3777d.png?resizew=240)
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2021-07-01更新
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2061次组卷
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7卷引用:2023年湖南省长沙市中考模拟数学试题(三)
2023年湖南省长沙市中考模拟数学试题(三)贵州省贵阳市2021年中考数学真题贵州省安顺市2021年中考数学真题2022年宁夏石嘴山市平罗县初中学业水平模拟(一)数学试题(已下线)专题33 阅读理解探究题压轴题-备战2022年中考数学临考题号押题(全国通用)2023年浙江省衢州市龙游县第三中学中考一模数学试题(已下线)专题4 数形思想
名校
8 . 立志成为数学家的波波,根据黄金分割点的概念和勾股定理研究出如下定义:
如图1,点M,N在线段
上,点M在点N的左侧,若线段
,
,
满足
,则称点M、N是线段
的钻石分割点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/4c8ebca0-338f-4725-a830-e935424c356a.png?resizew=677)
(1)【类比探究】如图2,D、E是
、
上两点,且
,M、N是
边的钻石分割点,连接
、
分别交
于点G、H.求证:G、H是线段
的钻石分割点.
(2)【知识迁移】如图3,点
是反比例函数
上的动点,直线
与坐标轴分别交于A、B两点,过点P分别向x、y轴作垂线,垂足为C、D,且交线段
于E、F.证明:E、F是线段
的钻石分割点.
(3)【拓展应用】如图4,已知一次函数
与坐标轴交于A、B两点,与二次函数
交于C、D两点,若C、D是线段
的钻石分割点,求m的值.
如图1,点M,N在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f13c62cc4155edb1feadc66938e497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/4c8ebca0-338f-4725-a830-e935424c356a.png?resizew=677)
(1)【类比探究】如图2,D、E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0137c721b8d4ea6dca8b7d9761134726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)【知识迁移】如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ead8d9a0deddcd52bfcc32dea6b3a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617a35388c7da566f8ac4a5710ebc531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812eed46a589bde8b7c78a81a8cf9b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)【拓展应用】如图4,已知一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60ecd5f53b3469726c8cb09e86ff20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292ea6bb80e9b8f88f509151b8ef3d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2021-08-13更新
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732次组卷
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4卷引用:2022年湖南省长沙市初中学业水平考试适应性测试数学试题(二)
2022年湖南省长沙市初中学业水平考试适应性测试数学试题(二)江苏省苏州市工业园区星港中学2020-2021学年九年级下学期3月月考数学试卷2022年江苏省苏州市九年级下学期中考数学全真模拟试题(01)(已下线)卷1-备战2022年中考数学【名校地市好题必刷】全真模拟卷(江苏苏州专用)·第一辑
9 . 类比、转化、从特殊到一般等思想方法,在数学学习和研究中经常用到,如下是一个案例,请补充完整.
原题:如图1,在平行四边形
中,点
是
的中点,点
是线段
上一点,
的延长线交射线
于点
.若
,求
的值.
![](https://img.xkw.com/dksih/QBM/2020/11/19/2596340784128000/2601452338790400/STEM/17134864-40b2-4f3d-8025-cc02c939326a.png?resizew=578)
(1)尝试探究
在图1中,过点
作
交
于点
,则
和
的数量关系是_________,
和
的数量关系是_________,
的值是_________.
(2)类比延伸
如图2,在原题的条件下,若
,则
的值是_________(用含有
的代数式表示),试写出解答过程.
(3)拓展迁移
如图3,梯形
中,
,点
是
的延长线上的一点,
和
相交于点
.若
,
,
,则
的值是________(用含
、
的代数式表示).
原题:如图1,在平行四边形
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8017580f716b548c192e72e04e1ccad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f803c907aa8d31a9359f24405990fc92.png)
![](https://img.xkw.com/dksih/QBM/2020/11/19/2596340784128000/2601452338790400/STEM/17134864-40b2-4f3d-8025-cc02c939326a.png?resizew=578)
(1)尝试探究
在图1中,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb50903843f7b423084a954e46adeb0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f803c907aa8d31a9359f24405990fc92.png)
(2)类比延伸
如图2,在原题的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea82411d04daefd2d45906278b24f4e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f803c907aa8d31a9359f24405990fc92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)拓展迁移
如图3,梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bdb3995265a321989202ff01001013d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b89309239f6bcaf4d978030b6768d72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4c3ee47f8df069c96bc61c7ec32b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f311053d11884b1a21d5f9b5724996c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ec395fe7a4bc51dac28c37085fabcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
2020-11-26更新
|
448次组卷
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10卷引用:湖南省永州市新田县2019-2020学年九年级上学期期中数学试题
湖南省永州市新田县2019-2020学年九年级上学期期中数学试题2020年湖南省长沙市长郡滨江中学中考数学3月模拟试题专题二 猜想证明类例题(已下线)【万唯原创】2015年河南省中考数学2014年真题-2012年河南省初中学业水平暨高级中等学校(已下线)【万唯原创】2016年河南省中考数学-2015年真题-2012年河南省初中学业水平暨高级中等学校招生考试山东省鄄城县2020-2021学年九年级上学期期中数学试题(已下线)类型二 与线段有关的问题-2021年《三步冲刺中考·数学》(陕西专用)之第2步大题夺高分山西省太原市第五中学2021-2022学年九年级上学期阶段考试数学试题山西省太原市第五中学校2021-2022学年九年级上学期10月月考数学试题河南省驻马店市第二初级中学2021-2022学年九年级上学期期末数学试题
10 . (1)如图①,在四边形
中,
,点
在
边上,
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ec2ec6cf30c455d67c34e27fe4957c.png)
(2)探究:如图②,在四边形
中,点
在
边上,当
时,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ec2ec6cf30c455d67c34e27fe4957c.png)
(3)拓展:如图③,在
中,点
是边
的中点,点
分别在边
上,若
,求
的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.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/71069b7ae2205c2f51022bd67e371772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ec2ec6cf30c455d67c34e27fe4957c.png)
(2)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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516bcdc180f55d0c66fe19c0712dcaef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ec2ec6cf30c455d67c34e27fe4957c.png)
(3)拓展:如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ff9d4fdd0d176042505b7aac016852.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/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24f91e93b8b15e9c0ff4923e5015313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/b2917860-4786-4ff2-bb10-11dd13a843e6.png?resizew=500)
您最近一年使用:0次
2020-11-23更新
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164次组卷
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2卷引用:湖南省衡阳市常宁市2020-2021学年九年级上学期期末数学试题