1 . 数学模型可以用来解决一类问题,是数学应用的基本途径.通过探究图形的变化规律,再结合其它数学知识的内在联系,最终可以获得宝贵的数学经验,并将其运用到更广阔的数学天地.
和正方形
,连接
,
.当正方形
绕点A旋转,如图1,猜想
与
的数量关系与位置关系,并说明理由;
(2)类比探究:如图2,若四边形
与四边形
都为矩形,且
,
,猜想
与
的数量关系与位置关系,并说明理由;
(3)实践应用:在(2)的条件下,连接
(点E在
上方),若
,且
,
,求线段
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/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)类比探究:如图2,若四边形
![](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/1b929269c53a44907dba8ee298a0a522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b924ff61fd33ec4dedba5430613454d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)实践应用:在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1111217c6e728976064fa6d10d6533d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06201e4f55b78d8b30afb257d5a1b16b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
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名校
2 . 问题情境:小红同学在学习了正方形的知识后,进一步进行以下探究活动:在正方形
的边
上任意取一点G,以
为边长向外作正方形
,将正方形
绕点A逆时针旋转.
【特例感知】
(1)当
在边
上时,连接
,
相交于点P,小红发现点P恰为
的中点,如图①.针对小红发现的结论,请给出证明.
(2)小红继续连接
,并延长与
相交,发现交点恰好也是
中点P,如图②.
(i)请说明理由.
(ii)根据小红发现的结论,请判断
的形状,并说明理由.
【规律探究】
(3)如图③,将正方形
绕点A逆时针旋转
,连接
,点P是
中点,连接
,
,
,
的形状是否发生改变?请说明理由.
![](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/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72d8a3dc6cb93171ee20567b5440775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72d8a3dc6cb93171ee20567b5440775.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/00c9ba80-d458-497f-a4a6-7f6a564682a7.png?resizew=650)
【特例感知】
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
(2)小红继续连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
(i)请说明理由.
(ii)根据小红发现的结论,请判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3cd61d00f89e68ccca2cac5c937783.png)
【规律探究】
(3)如图③,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72d8a3dc6cb93171ee20567b5440775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3cd61d00f89e68ccca2cac5c937783.png)
您最近一年使用:0次
2023-11-14更新
|
119次组卷
|
2卷引用:湖北省孝感市八校联谊2023-2024学年九年级上学期联考数学试题
名校
3 . 在学习正方形的过程中,小军发现一个规律:在正方形ABCD中,E为AD边上任意一点,连接BE,若过点A的直线
,交CD于点G,则必有
.为了验证此规律的正确性,小军的思路是:先利用下图,过点A作出BE的垂线,再通过证全等得出结论.请根据小军的思路完成以下作图与填空:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/0ff7c9d4-e335-412e-9973-87197435f31d.png?resizew=141)
(1)用直尺和圆规在下图的基础上过点A作BE的垂线AG,交BE于点F,交CD于点G.(只保留作图痕迹)
(2)证明:∵四边形ABCD是正方形,
∴
①
,
,
∴
.
∵ ②
∴
,
∴
,
∴ ③ ,
在
和
中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3aae1b288ff1214802d5347ef2923a.png)
∴
.
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fdc5e36a59ce2f0c2208126033b4954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9feca8d384d09b47e5be73219658df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/0ff7c9d4-e335-412e-9973-87197435f31d.png?resizew=141)
(1)用直尺和圆规在下图的基础上过点A作BE的垂线AG,交BE于点F,交CD于点G.(只保留作图痕迹)
(2)证明:∵四边形ABCD是正方形,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4af17b55fa474f0103a858c2604b093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c06422e1d55db3077257af113df4bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d667c4527dc9910fc0c536aa1bbb3f0.png)
∵ ②
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28c473b40b3cf82757682b7fb71486c.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf45ef0a298fff057613c1589e8a67e.png)
∴ ③ ,
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09a769a75b107390b9eeccc929f761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbd6f0a0412d0f43ce1f7c1d530e56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3aae1b288ff1214802d5347ef2923a.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c20dbb30a6b86548e112935fec27802.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9feca8d384d09b47e5be73219658df.png)
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4 . 如图,正方形
边长为6,点
,
分别是边
,
上的动点(点
不与
、
重合),连接
,
,且
.
;
(2)设
,
的面积为
,用含有
的式子表示
,并写出自变量
的取值范围;
(3)结合(2)的关系式,描述
的面积
随
长度
的变化规律.
![](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/03902478df1a55bc99703210bccab910.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33f381b03270154695d6b5421b1e739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc6647263946b377680eecffcdce241d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c30f73c718bde8352055a14987fc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)结合(2)的关系式,描述
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
真题
5 . 问题情境:小红同学在学习了正方形的知识后,进一步进行以下探究活动:在正方形
的边
上任意取一点G,以
为边长向外作正方形
,将正方形
绕点B顺时针旋转.
(1)当
在
上时,连接
相交于点P,小红发现点P恰为
的中点,如图①.针对小红发现的结论,请给出证明;
(2)小红继续连接
,并延长与
相交,发现交点恰好也是
中点P,如图②,根据小红发现的结论,请判断
的形状,并说明理由;
规律探究:
(3)如图③,将正方形
绕点B顺时针旋转
,连接
,点P是
中点,连接
,
,
,
的形状是否发生改变?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac49d8955b114d079bb2f7e9d9b4d9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)小红继续连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
规律探究:
(3)如图③,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
您最近一年使用:0次
2023-06-29更新
|
1782次组卷
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13卷引用:辽宁省鞍山市岫岩满族自治县石灰窑镇中学2023-2024学年九年级上学期12月月考数学试题
辽宁省鞍山市岫岩满族自治县石灰窑镇中学2023-2024学年九年级上学期12月月考数学试题2023年湖南省湘潭市中考数学真题(已下线)第23单元03巩固练(已下线)专题1.11 正方形的性质与判定(直通中考)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)(已下线)XDRzkgssxzw9103(已下线)专题23.17 旋转(直通中考)(全章培优练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题31 几何综合压轴题(共23道)-学易金卷:2023年中考数学真题分项汇编(全国通用)(已下线)专题16 矩形、菱形、正方形-学易金卷:三年(2021-2023)中考数学真题分项汇编(湖南专用)(已下线)第5讲 探究题(已下线)专题9.44 中心对称图形——平行四边形(直通中考)(培优练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)(已下线)专题11 四边形压轴题综合-2024年中考数学二轮热点题型归纳与变式演练(全国通用)山东省威海市威海经济技术开发区2023-2024学年八年级下学期5月期中数学试题2024年甘肃省定西市安定区公园路中学下学期二模数学试题
6 . 如图,在边长为4cm的正方形
中,动点M从点B出发,沿
方向以1cm/s的速度匀速运动(当点M到达点A时停止运动),以
为边往
方向作正方形
,延长
交
于点N,交
于点E,连接
,设运动时间为t(s).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/ae9e7594-a43d-4d34-b814-b7cd48d96d19.png?resizew=390)
(1)当
s时,
;
(2)在运动过程中,当
是以
为腰的等腰三角形时,求t的值;
(3)小南发现当点M在线段
之间运动(不与点A、B重合)时,四边形
的面积与
的面积的比值
随着时间t的变化呈现出某种规律,若设
,请你帮他求出y关于时间t的关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c7cc3ae738d6499975cd7917439cd7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6927cc2a930203ac34366383e76ef.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/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/ae9e7594-a43d-4d34-b814-b7cd48d96d19.png?resizew=390)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99d3783d295c85cf66b28754808dfc3f.png)
(2)在运动过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)小南发现当点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943cdc166824e80f280fe6bfaf5f9072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654a3aacb8539b4996023caf5b55c85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485f38e69c370c090efa48a8518ac44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0e5b0dcf6cf3726d4bca9d131fdccb.png)
您最近一年使用:0次
2022-11-15更新
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101次组卷
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2卷引用:湖南省长沙市一中双语实验学校2022-2023 学年九年级上学期第三次月考数学试卷
7 . 在平面直角坐标系中,正方形ABCD的位置如图所示,点A的坐标为(1,0),点D的坐标为(0,2).延长CB交x轴于点A1,作第1个正方形A1B1C1C;延长C1B1交x轴于点A2,作第2个正方形A2B2C2C1,…,按这样的规律进行下去,第2016个正方形的面积是______ .
![](https://img.xkw.com/dksih/QBM/2019/6/23/2231725861486592/2232358630989824/STEM/7a2d8a55530c4c48a9490f1d313a9e67.png?resizew=211)
您最近一年使用:0次
2017-12-05更新
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1872次组卷
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3卷引用:山东省济南市2019-2020学年第一学期第一次月考初三数学试题