1 . 【问题背景】
如图①,在矩形
中,
,
,点
为边
上一点,沿直线
将矩形折叠,使点
落在
边上的点
处.
【问题解决】
(1)
的长为________;
(2)如图②,展开后,将
沿线段
向右平移,使点
的对应点与点
重合,得到
,
与
交于点
,求线段
的长;
【拓展探究】
(3)将图①中的
绕点
旋转得
(点
、
的对应点分别为点
、
),当
、
、
三点共线时,请直接写出
的长.
如图①,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
【问题解决】
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
(2)如图②,展开后,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99fbe87b1253e909fea69ab2192fbe94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ab0d4fc7d64bd12d32f21ab220ef55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cece895cbddf9d1f37f75e3b6346edda.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/49b50357a6545cae8348e3059312f520.png)
【拓展探究】
(3)将图①中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99fbe87b1253e909fea69ab2192fbe94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122162e70381bbd9908be1af5d93bc58.png)
![](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/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.png)
您最近一年使用:0次
2 . 【问题情境】如图,在
中,
,
,
是
边上的高,点E是
上一点,连接
,过点A作
于F,交
于点G.
时,求证:
;
(2)【类比探究】如图2,当
时,(1)中的结论是否还成立?若成立,请写出证明过程,若不成立,请指出此时
与
的数量关系,并说明理由;
(3)【拓展运用】如图3,连接
,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/61cfd2a95ad9cf4d9e236bdaa754f719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a598a35e6a4bfb3a5f08b55b70bdc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46d93b877d359a4218e156b46d5aa3e.png)
(2)【类比探究】如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c525393775354325cbf7839366ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)【拓展运用】如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2f91aa5dea19712561c7905535d15b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767a8eafa46bb877d2591b7b13d23e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次
2024-03-31更新
|
346次组卷
|
6卷引用:2024年湖北省孝感市中考一模数学试题
3 . 综合与实践
在学习了“特殊平行四边形”后,兴趣小组的同学发现了这样一个问题:如图1,已知正方形
,E为对角线
上一动点,过点
作垂直于
的射线
,点
在射线
上,且
,连接
.通过观察图形,直接写出
与
的数量关系: .
(2)【类比探究】
兴趣小组的同学在探究了正方形中的结论后,将正方形换成矩形继续探究.如图2,已知矩形
,
,
,
为对角线
上一动点,过点
作垂直于
的射线
,点
在射线
上,且
,连接
.请判断线段
与
的数量关系,并说明理由.
(3)【拓展应用】
在(2)的条件下,点E在对角线
上运动,当四边形
为轴对称图形时,请直接写出线段
的长: .
在学习了“特殊平行四边形”后,兴趣小组的同学发现了这样一个问题:如图1,已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6218fe7c62cd2dd2b7c70b8f91a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
(2)【类比探究】
兴趣小组的同学在探究了正方形中的结论后,将正方形换成矩形继续探究.如图2,已知矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630b9ca3d20635161fa8fbf812b9128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26ad70d2b3aac8604834d57dfc59bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6218fe7c62cd2dd2b7c70b8f91a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
(3)【拓展应用】
在(2)的条件下,点E在对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef48918ed426d68d64591b866998a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
您最近一年使用:0次
名校
4 . 综合与实践:
【问题情境】
在数学活动课上,王老师让同学们用两张矩形纸片进行探究活动.阳光小组准备了两张矩形纸片
和
,其中
,
,将它们按如图所示的方式放置,当点A与点E重合,点F,H分别落在
,
边上时,点F,H恰好为边
,
的中点,然后将矩形纸片
绕点A按逆时针方向旋转,旋转角为
,连接
与
.
【观察发现】
如图2,当
时,小组成员发现
,易得
,
.
【探索猜想】
(1)如图3,当
时,【观察发现】中发现的结论
,
是否仍然成立?请说明理由.
【拓展延伸】
(2)在矩形
旋转过程中,当C,A,F三点共线时,请求出线段
的长.
【问题情境】
在数学活动课上,王老师让同学们用两张矩形纸片进行探究活动.阳光小组准备了两张矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
【观察发现】
如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1479d27e73f5b65d78996796f01c15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6ce7d2d3fb93328c44557249ef2b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c65dd20af94247cb634911e7e215fd8.png)
【探索猜想】
(1)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b5ea2fc43b19ca043581eb94197234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6ce7d2d3fb93328c44557249ef2b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c65dd20af94247cb634911e7e215fd8.png)
【拓展延伸】
(2)在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/10/50529b66-be2c-4d84-84cb-3bc56ebe0316.png?resizew=429)
您最近一年使用:0次
5 . 定义:我们知道,四边形的一条对角线把这个四边形分成了两个三角形,如果这两个三角形相似(不全等),我们就把这条对角线叫做这个四边形的“相似对角线.
【问题探究】
(1)如图1,已知在正方形网格中,请你只用无刻度的直尺在网格中找到一点D,使四边形
是以
为“相似对角线”的四边形(保留画图痕迹,找出1个即可);
【问题解决】
(2)如图2,在四边形中,
,
,对角线
平分
,求证:
是四边形
的“相似对角线”;
【拓展应用】
(3)如图3,已知是四边形
“相似对角线”,
,连接
,若
的面积为
,求
的长.
您最近一年使用:0次
6 . 在
中,
于点D,点P为射线
上任一点(点B除外)连接
,将线段
绕点P顺时针方向旋转
,
,得到
,连接
.
,且
时,
与
的数量关系是 .
(2)(猜想证明)如图2,当
,且
时,(1)中的结论是否成立?若成立,请予以证明;若不成立,请说明理由.(请选择图2、图3中的一种情况予以证明或说理).
(3)(拓展探究)在(2)的条件下,若
,
,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efc7b22d85ff04a0ac89743f0bea1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbc28ba86213e215af01cb50e95aaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e4a2df58a236c20df5df0d29a466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)(猜想证明)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e4a2df58a236c20df5df0d29a466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
(3)(拓展探究)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b14b1c160f8b00578a0b447194278c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
2024-03-21更新
|
132次组卷
|
2卷引用:2024年山东省青岛市中考数学模拟预测题
7 . 综合与实践课上,老师带领同学们开展以“图形的变化”为主题的数学活动.
(1)观察发现
如图1,如图1,将平面直角坐标系中
进行平移后得到
,则线段
与线段
的位置关系为 ,数量关系为 ;
如图2,将平面直角坐标系中
以点B为旋转中心逆时针旋转
得到
则线段
所在直线与线段
所在直线的位置关系为 ;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/2/8f6d0128-4f71-47f3-ba0b-61767ee1f81c.png?resizew=368)
(2)探究迁移
如图3,将平面直角坐标系中
进行平移后得到
,再将
以点
为旋转中心逆时针旋转
得到
线段
所在直线与线段
所在直线相交于点P,锐角
记为β,请判断α和β的数量关系并说明理由;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/2/4f2cddfd-d0b4-4bb5-bb19-f9043e407dec.png?resizew=384)
(3)拓展应用
如图4,平面直角坐标系中
,
,
,
,将
在x轴上水平平移得到
平移后以
为旋转中心将
逆时针旋转
得到
线段
所在直线与线段
所在直线在P点相交,若点
在某个位置可使点P与点
或点
重合,请直接写出m的值.
(1)观察发现
如图1,如图1,将平面直角坐标系中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e968a680c085015f5bfea60f7db9850f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b11ec71350bc49e9b73959baedcad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/2/8f6d0128-4f71-47f3-ba0b-61767ee1f81c.png?resizew=368)
(2)探究迁移
如图3,将平面直角坐标系中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b40aa8d2482d698ebef69cf225f99f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740f166d28ee1b09cde0c4e6420f080c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d77f02e8eb6827be9c42cdd153ccddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1369e52c1f7a1df05b7da4c7ad310541.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/2/4f2cddfd-d0b4-4bb5-bb19-f9043e407dec.png?resizew=384)
(3)拓展应用
如图4,平面直角坐标系中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c513dca3b8c31bc8d0ed4301e94cc1e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f304c4bfe683ced57419593537402d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602acab78bfc4aa216e8ace528efff66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cca121a2e8b03262a1e8b2508f1c6f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6012e5f062202e67356fd8d678fbd5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45fd651dd5027d57d542ab510f8a9ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f68dfc2ca5a280a7439b8769188816f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d77f02e8eb6827be9c42cdd153ccddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc43bee5e0ef79167751b587ecbe809e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
您最近一年使用:0次
8 . 某数学兴趣小组在探究“手拉手”模型时,等边三角形
和
按如图1摆放.连接
,
,延长
交
于点
,连接
,保持
不动,将
绕点
旋转.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/92360d70-05ee-4c49-a8c7-0ff98a091bd0.png?resizew=505)
【初步探究】(1)如图2,当点
,
重合时,请写出
,
,
之间的数量关系并加以证明:
【深入探究】(2)如图1,当点
,
不重合时,(
)中的结论是否仍然成立?若成立,请给出推理过程;若不成立,请说明理由.
【拓展延伸】(3)如图3,当
和
都是等腰直角三角形,
.连接
,
,延长
交
于点
,连接
,试探究
,
,
之间的数量关系,并说明理由.
【推广应用】(4)如图
,在
中,若
.连接
,
、延长
交
于点
,连接
,请直接写出
,
,
之间的数量关系:________.
![](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/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/92360d70-05ee-4c49-a8c7-0ff98a091bd0.png?resizew=505)
【初步探究】(1)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
【深入探究】(2)如图1,当点
![](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/bdaa19de263700a15fcf213d64a8cd57.png)
【拓展延伸】(3)如图3,当
![](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/21c2425db34d83dbe44f3ee3d2c5439b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
【推广应用】(4)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67061e6fa526d1e082bed7b01c819982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fad52bca7ff0186960747ac45e7a21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
您最近一年使用:0次
9 . 问题情境:
在数学课上,张老师带领学生以“图形的平移”为主题进行教学活动.在菱形纸片
中,
,对角线
,将菱形沿对角线
剪开,得到
和
.将
沿射线
方向平移一定的距离,得到
.
观察发现:
(1)如图①,菱形
中,
;
如图②,连接
,四边形
的形状是 ;
(2)将
沿直线
翻折,得
,如图③,然后沿射线
方向进行平移,连接
,若添加一个条件,能否使得四边形
是一个特殊的四边形?若能,请写出添加的条件和这个特殊的四边形,并写出证明过程,若不能,说明理由.
(3)在(2)的条件下,设
和
相交于点
,当
是
的三等分点时,直接写出
的面积.
在数学课上,张老师带领学生以“图形的平移”为主题进行教学活动.在菱形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
观察发现:
(1)如图①,菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629f896496e9a6fd7df6e0a56e0a6243.png)
如图②,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c30c0d64b256b3efc386ff6276f1ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f46b357e543eb2e895d0ea4742f4546.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da547af5752515964c58948ec3a5f89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe08221bb58fef1459a6b6412497d187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f920913237cb68d097c13578691112f.png)
(3)在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f574463a3c3541e3e42cf7e1fee8e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369c774635fb4384dcbabe732c7c5b27.png)
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2024-05-28更新
|
98次组卷
|
2卷引用:2024年河南省开封市中招第一次模拟考试数学试题
10 . 【模型定义】
如果正方形的一边落在三角形的一边上,其余两个顶点分别在三角形的另外两条边上,则这样的正方形叫做三角形的内接正方形.
【问题探究】
(1)如图①,在
中,
,
边上的高
,
是
的内接正方形,设正方形
的边长是x,求证:
;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/b2bb0ba3-8b9a-4c6c-aa0d-762078aa565c.png?resizew=148)
(2)在
中,
,
,
,图②和图③是两种不同的内接正方形,请计算回答哪个内接正方形的面积最大;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/fa830da6-62ca-45bb-a746-13f8102a05af.png?resizew=360)
【拓展延伸】
(3)在锐角
中,
,
,
,且
,请问当正方形的一边落在三角形的 边上时,这个三角形的内接正方形的面积最大.不需要说明理由.
如果正方形的一边落在三角形的一边上,其余两个顶点分别在三角形的另外两条边上,则这样的正方形叫做三角形的内接正方形.
【问题探究】
(1)如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512e40749f5218546e622e23983cbd85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c089c7935c96a858d49fefb5f6b21ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/b2bb0ba3-8b9a-4c6c-aa0d-762078aa565c.png?resizew=148)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/fa830da6-62ca-45bb-a746-13f8102a05af.png?resizew=360)
【拓展延伸】
(3)在锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df81cda12d7601d58b1d9c7c180c4d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c884a45b56bc34d79273b067c1520b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b73abfe4bc26b1ded680d7abb1a2cac.png)
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