1 . 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,求证:
;
(2)类比探究
如图2,当
,
与边
相交时,在
上取一点G,使
,
交
于点H.探究
的值(用含m的式子表示),并写出探究过程:
(3)拓展运用
在(2)条件下,当
,
是
的中点时,若
.直接写出
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)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/f9a38a0e-6c8b-4f7a-8ae2-aeef6f2fe645.png?resizew=497)
(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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8657c9063fed8b1d90c37f9fea4e92.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/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/5e0eb1703779b7574605f3f60fa83fbf.png)
(3)拓展运用
在(2)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)
您最近一年使用:0次
2023-06-06更新
|
92次组卷
|
4卷引用:2022年湖北省武汉市东西湖区中考质检数学试题(一)
2 . 【问题背景】(1)如图1,
中,
,求证:
.
【问题探究】(2)如图2,
中,
,
平分
,
于点
,过点
作
的平行线交
于点
,作
于点
,猜想
与已有的哪条线段的一半相等,并加以证明;
【问题拓展】(3)在(2)上述条件下,当
时,直接写出
的正切值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5446e511ba5345e4d9477ce3f5215e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623c0a193c22731aa622f839f424f82f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/6/58a344b5-2273-444f-917d-54ac88fdac2b.png?resizew=356)
【问题探究】(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c90da0cd2708481057fe19acebf2ec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
【问题拓展】(3)在(2)上述条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c22e0828e2ab17e340309733df9746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6fa8f76092289a3544dbfa32960c953.png)
您最近一年使用:0次
名校
3 . 【问题情境】
和
是共顶点的两个三角形,点P是边
上一个动点(不与B重合),且
,
,连接
.
(1)【特例分析】如图①,当
,
时.猜想
与
之间的数量关系,并说明理由;并求出
的度数.
(2)【拓展探究】如图②,当
,
时.请判断
与
的数量关系以及
与
之间的数量关系,并说明理由.
(3)【学以致用】如图③,当
,
,
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/768e16640897560f85eb38ed7cb6512f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4a64f48ce64bcd490992a4ada1ef9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/3ed65cdc-d578-40bf-a953-478106dcdb26.png?resizew=395)
(1)【特例分析】如图①,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8625b92cffeee72845e2823899fc2cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241e82458d3829175373c3c018f15be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
(2)【拓展探究】如图②,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8625b92cffeee72845e2823899fc2cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15928c11adfe993baa96ee76cb929f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)【学以致用】如图③,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0505b2b098dc34a0d3c6be71b3e36f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedd51383f8f047f565191b128cec637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574dc284fb9e74d65cf0c79a978d65de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2023-05-19更新
|
156次组卷
|
4卷引用:2023年湖北省襄阳市枣阳市中考一模数学试题
2023年湖北省襄阳市枣阳市中考一模数学试题(已下线)2023年襄阳一模(几何综合)(已下线)2023年湖北省黄冈市中考数学真题变式题21-24题山东省日照市东港区新营中学2023-2024学年九年级上学期12月月考数学试题
4 . 【问题提出】如图1,在
中,
,点
,
分别为边
,
的中点,将
绕点
顺时针旋转
,连接
,
,试探究
,
之间存在怎样的数量关系和位置关系?
,将
绕点C顺时针旋转至图2的位置,直线
与
,
分别交于点
,
.按以下思路完成填空(第一个空填推理依据,第二个空填数量关系,第三个空填位置关系):
∵
,点
,
分别为边
,
的中点
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac679f877d3e3b3acef1f1f8e3654b4b.png)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cd4258494ace78556e465e02513c6c3.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627e946cdb6ed2652fee6c26db93bac9.png)
∴
(__________)
∴
__________
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4028de7de29c71c4fb2f83b6c951680.png)
又∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d08319f9623e9729df57ca6edee11f5.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccb93d163954e5cf7b92feff5a61057.png)
∴
__________
.
【猜想证明】若
,
绕点
顺时针旋转至图3的位置,直线
与
,
分别交于点
,
,猜想
与
之间的数量关系与位置关系,并就图3所示的情况加以证明;
【拓展运用】若
,
,将
绕点
顺时针旋转
,直线
与
相交于点
,当以点
,
,
,
为顶点的四边形是矩形时,请直接写出
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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](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/9f5a0a6e5b3f489a7032ea5116c96024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c54ce139ae5d63691cac8a1ce5bbfe4.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5a0a6e5b3f489a7032ea5116c96024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/4b10134e7a46e6f6f7cb9d5e2371727d.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac679f877d3e3b3acef1f1f8e3654b4b.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cd4258494ace78556e465e02513c6c3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627e946cdb6ed2652fee6c26db93bac9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ee313629fdb421c7b0ee01ed3b6fa5.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/e4028de7de29c71c4fb2f83b6c951680.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d08319f9623e9729df57ca6edee11f5.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccb93d163954e5cf7b92feff5a61057.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
【猜想证明】若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c6dd4cf25c7ffbcc91c22446b5352c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5a0a6e5b3f489a7032ea5116c96024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
【拓展运用】若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5a0a6e5b3f489a7032ea5116c96024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c54ce139ae5d63691cac8a1ce5bbfe4.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
您最近一年使用:0次
2023-05-18更新
|
151次组卷
|
3卷引用:2023年湖北省随州市曾都区中考一模数学试题
5 . (1)操作发现:在综合实践课上,同学们进行正方形图形变换探究活动,如图1,四边形
和四边形
都是正方形,点E在
上运动,在
上截取
,使
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/81d9942b-f5b9-4361-b4d4-af3e2423bb32.png?resizew=620)
①发现:
,请证明;
②推断:线段
与
的关系是______ ;
(2)探究拓展:如图2,四边形
和四边形
都是矩形,点E在
上运动,
,在
上截取
,使
,连接
.判断线段
与
的关系并证明;
(3)学以致用:在(2)的条件下,连接
交
于点M,连接
并延长交
于点P(如图3).当
时,若
,
,求
的长.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1289b01f9dde573ca64d716233e36cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/81d9942b-f5b9-4361-b4d4-af3e2423bb32.png?resizew=620)
①发现:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6479f73d9fa2b3220de4f8e2c0f1699c.png)
②推断:线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)探究拓展:如图2,四边形
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d86dbbe5909cf4718e91df0a29706c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f89f6e9e0dd98070858129d8da0690d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)学以致用:在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c678cb3d5175830b4b6b9968dfc5048b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a51acdbf1275b5de9d64c81b843fa1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04725e51b4870658f74de79403e3898f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
您最近一年使用:0次
2023-05-15更新
|
163次组卷
|
3卷引用:2023年湖北省襄阳市老河口市中考一模数学试题
6 . (1)问题探究:如图1,
,
均为等边三角形,连接
、
,求证:
.
(2)类比延伸:如图2,在
和
中,
,
,连接
、
,求证:
.
(3)拓展迁移:如图3,在四边形
中,
,且
,
,若将线段
绕点D按逆时针方向旋转
得到
,连接
,求线段
的长.
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
(2)类比延伸:如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e7ba6e267dde1a65a98f9f36b585ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd9776aa108071b50b71adf181bbdaf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cab3976641d2ad9aa50a30d4c8092cb.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/8c4b798f9bb5482f0a3cfa1bfd77d245.png)
(3)拓展迁移:如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8049be7e7cd824771471bfac2bf70ae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12daf5fea89631b84f896939c503d88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12daf5fea89631b84f896939c503d88a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/41453063-0eff-41ca-afbc-1280d661c17a.png?resizew=485)
您最近一年使用:0次
7 . 【探究】
已知,点
,
,
,
分别在四边形
的四条边上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6e1eb7a0bb8b88a7056bc2cf7a7fc0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/1d516bdd-5bf7-4c83-9cd9-c8d25d1b2fd1.png?resizew=460)
(1)如图
,若四边形
为正方形,
,则
______;
(2)如图
,若四边形
为矩形,
,
,求
的值.
(3)【拓展】
如图
,四边形
中,点
,
分别在
,
上,且
,若
,
,
,求
的值.
已知,点
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6e1eb7a0bb8b88a7056bc2cf7a7fc0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/1d516bdd-5bf7-4c83-9cd9-c8d25d1b2fd1.png?resizew=460)
(1)如图
![](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/3319509bbd6b74f077bc88681d7be74d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d151cd24c2f9c320eb54e69d71e5cb46.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d42e97eee705d164e6ac6de9ecd6d1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d12504c6da5f94ba2656ca727c2fe82.png)
(3)【拓展】
如图
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e22ba3e6e1c1d6b12d9b8baa8d1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061080203fc853299a4704d2b9cd3a01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb5a38c27c3111dfd51b49de5b2e27fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266448067c16af49b5abf9dd2bff1a14.png)
您最近一年使用:0次
真题
名校
8 . 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: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)
(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)2022年湖南省岳阳市中考数学真题(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)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
9 . (1)问题发现
如图1,在
中,
,D是线段
上一动点,以
为一条边在
A的左侧作
,使
,连接
.则
与
的数量关系为_________.
(2)类比探究
如图2,在
中,D是线段
上一动点,以
为一条边在
的左侧作
,使
且
,连接
.则(1)中
与
的数量关系仍然成立吗?请说明理由.
(3)拓展应用
如图3,在(2)的条件下,若
,
,当
取最小值时,
的面积为_________.
如图1,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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6dd17e73fc1db1a8155eb91c8c4e8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da756f78b3409948a841ecb549f64bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316908a938af254508f414226ba328cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(3)拓展应用
如图3,在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e744f480e11f588570c5d6738799f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/9f77a530-d386-4b94-aa10-afcd97afba6e.png?resizew=389)
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2022-05-28更新
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3卷引用:2022年湖北省咸宁市赤壁市九年级5月调考数学试题
10 . 一次小组合作探究课上,老师将两个正方形按如图1所示的位置摆放(点E,A,D在同一条直线上).
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620845826048/2980718784348160/STEM/1e9ee432-c569-4cb8-92d7-8ad95fa52c5c.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620845826048/2980718784348160/STEM/981d3148-e570-4002-a2dc-a6ec7d6294dd.png?resizew=102)
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620845826048/2980718784348160/STEM/e75a42df-5acb-4ed2-992e-c6ba7af09031.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620845826048/2980718784348160/STEM/c926e649-a0d8-4b61-bfca-79560fdfca8a.png?resizew=170)
(1)证明推断:将正方形AEFG绕点A按逆时针方向旋转到如图2所示的位置.①求证:BE=DG;②推断:BE与DG的位置关系为______;
(2)类比探究:将(1)中的正方形分别改写成矩形AEFG和矩形ABCD,将矩形AEFG绕点A按顺时针方向旋转(如图3),且
.探究BE与DG的数量关系(用含a,b的式子表示),并写出探究过程.
(3)拓展运用:如图4,在(2)的条件下,当
,AE=4,AB=8,连接DE,BG.小组发现:在旋转过程中,
的值是定值,请求出这个定值.
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620845826048/2980718784348160/STEM/1e9ee432-c569-4cb8-92d7-8ad95fa52c5c.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620845826048/2980718784348160/STEM/981d3148-e570-4002-a2dc-a6ec7d6294dd.png?resizew=102)
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620845826048/2980718784348160/STEM/e75a42df-5acb-4ed2-992e-c6ba7af09031.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620845826048/2980718784348160/STEM/c926e649-a0d8-4b61-bfca-79560fdfca8a.png?resizew=170)
(1)证明推断:将正方形AEFG绕点A按逆时针方向旋转到如图2所示的位置.①求证:BE=DG;②推断:BE与DG的位置关系为______;
(2)类比探究:将(1)中的正方形分别改写成矩形AEFG和矩形ABCD,将矩形AEFG绕点A按顺时针方向旋转(如图3),且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a27731dbf0033a27d0ac58aaf7968ea.png)
(3)拓展运用:如图4,在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9213da82fd4080bb3097671bdd2a28e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd35e8ebeb27cf3a4128c0c59904e63.png)
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