名校
1 . 几何探究
【课本再现】
(1)如图1,正方形
的对角线相交于点
,点
又是正方形
的一个顶点,而且这两个正方形的边长相等,边
与边
相交于点
,边
与边
相交于点
.在实验与探究中,小新发现无论正方形
绕点
怎样转动,
之间一直存在某种数量关系,小新发现通过证明
即可推导出来.请帮助小新完成下列问题:
①求证
;
②连接
,则
之间的数量关系是____________.
【类比迁移】
(2)如图2,矩形
的中心
是矩形
的一个顶点,
与边
相交于点
与边
相交于点
,连接
,矩形
可绕着点
旋转,猜想
之间的数量关系,并进行证明;
【拓展应用】
(3)如图3,在
中,
,直角
的顶点
在边
的中点处,它的两条边
和
分别与直线
相交于点
可绕着点
旋转,当
时,请直接写出线段
的长度.
【课本再现】
(1)如图1,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4635a4e561d862638f6818e85e74bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc526324e78e4d9226d1b537f27845a.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/0b3791f7eb4d33d52bf7a73c1b3e75f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4635a4e561d862638f6818e85e74bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e045bc50398f2a1196c67a83a1b00b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f8ef68028027c080166047e312fba12.png)
①求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0f79142caacc4d08942ffa23511f66.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e045bc50398f2a1196c67a83a1b00b5.png)
【类比迁移】
(2)如图2,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4635a4e561d862638f6818e85e74bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc526324e78e4d9226d1b537f27845a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d83d6bef3863e008fd27c52b9422e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4635a4e561d862638f6818e85e74bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e045bc50398f2a1196c67a83a1b00b5.png)
【拓展应用】
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76899b3a0bfbbdae7cb1148ad4bf018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8daa1fe561e2aef00b5baa3fe45f12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c962fe4f47732b8e6e83d17ff2b9af13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0512238dc25537ecef76e221e89382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42779f180e18631a621c16da39d319ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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2卷引用:2024年广西南宁市第二中学九年级中考二模数学试题
2 . 如图1,直线
与
轴、
轴分别交于
、
两点,点
在线段
上从
向
运动,过点
作直线
垂直于
轴,另一动点
从
出发,沿直线
向上运动,记
的长为
,
的坐标为
,分析此图后,对下列问题作出探究:
,
;
(2)当
时,求出
、
的值;
(3)如图
当
垂直时,
①猜想线段
和
的数量关系,并证明你得到的结论;
②求出
关于
的函数关系式,并写出自变量
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501a6d50c937729c8d0f02b2b62a0ee4.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722392aff48b20c66ac9f38a7afabeeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a548e8a2e2205f2faa87e25180a083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a836d2dfc31d2bfc949bac8403cf2a4e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/759f39be289d60cdb4de0677ab425211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7737522e76ac74ead6b90a8e09b6da5.png)
①猜想线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
②求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2卷引用:广西壮族自治区桂林市宝贤中学2023-2024学年八年级下学期期中数学试题
3 . 在
中,
,
是斜边
上一点,将线段
绕点
旋转至
位置,点
在直线
外,连接
,
,
.
,求证:
是
的中点;
(2)已知点
和边
上的点
满足
,连接
,
,
.
(
)如图
,求证:四边形
是菱形.
(
)如图
,连接
,若
,
,求
值.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f46f19939f38833f9152942f8241b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1893d78af450a5fa09810537adc2dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062eeae4f31172ec99c10edc25697cad.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971ab6567c156fee308640828a804415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8631252e105672a80fc5bcba54fdb2.png)
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4卷引用:2024年广西壮族自治区中考数学模拟考试试题
2024年广西壮族自治区中考数学模拟考试试题2024年安徽省合肥市瑶海区行知教育集团中考一模数学试题(已下线)热点06 四边形(2大考点5种题型+重难通关练+培优争分练)-2024年中考数学【热点·重点·难点】专练(安徽专用)2024年安徽省六安市中考模拟数学试题
4 . 综合与实践
【素材呈现】在数学活动课上,老师给出如下信息:如图1,在四边形
中,
,E 是边
上一点,
于点F,
.
【独立思考】(1)试判断四边形
的形状,并说明理由.
【实践探究】(2)希望小组受此问题的启发提出新的问题:如图2,在正方形
中,E 是边
上一点,
于点F,
交
的延长线于点H,
交
的延长线于点G,请判断线段
之间的数量关系,并说明理由.
【问题解决】(3)智慧小组讨论交流后又发现新的探究点:如图3,在正方形
中,E 是边
上一点,
交
的延长线于点 H,在
上截取线段
,连接
.若
,请直接写出线段
的长.
【素材呈现】在数学活动课上,老师给出如下信息:如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1893d78af450a5fa09810537adc2dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b8aec783b68dcb88a4839b5a598f033.png)
【独立思考】(1)试判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
【实践探究】(2)希望小组受此问题的启发提出新的问题:如图2,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1893d78af450a5fa09810537adc2dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54ab4bf86fe0ed4bbc4c9e00c5d838ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee38668bd4d62fe28999499c5a978b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/184921a45f87423e92cf1e627ad55143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ed011f739bb778edcbdbaeba1d12d4.png)
【问题解决】(3)智慧小组讨论交流后又发现新的探究点:如图3,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54ab4bf86fe0ed4bbc4c9e00c5d838ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af80c5d18c86b43e4be5a8ad3a7499f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a177ae3840536a0fb5e9ff0b2131a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f427972485033c978801ef68383daabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
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5 . 【综合与实践】
【问题背景】
如图①,“漏刻”是我国古代一种利用水流计时的工具,古诗“金炉香尽漏声残,翦翦轻风阵阵寒”,描绘了“漏刻”不断漏水的情景.
如图②,综合实践小组用甲、乙两个透明的竖直放置的容器和一根装有节流阀(控制水的流速)的软管,制作了类似“漏刻”的简易计时装置.
,综合实践小组在甲容器里加满水,此时水面高度为
,开始放水后,每隔
记录一次甲容器中的水面高度,相关数据如表:
【建立模型】小组讨论发现:“
,
”是初始状态下的准确数据,每隔
水面高度值的变化不均匀,但可以用一次函数近似地刻画水面高度h与流水时间t的关系.
【问题解决】
(1)利用
时,
;
时,
这两组数据求水面高度h与流水时间t的函数解析式;
(2)利用(1)中所求解析式,计算当甲容器中的水面高度为
时是几点钟?
(3)经检验,发现有两组表中观察值不满足(1)中求出的函数解析式,存在偏差,小组决定优化函数解析式,减少偏差.通过查阅资料后知道:t为表中数据时,根据(1)中解析式求出所对应的函数值,计算这些函数值与对应h的观察值之差的平方和,记为w;w越小,偏差越小.请根据表中数据计算出(1)中得到的函数解析式的w值;
【问题背景】
如图①,“漏刻”是我国古代一种利用水流计时的工具,古诗“金炉香尽漏声残,翦翦轻风阵阵寒”,描绘了“漏刻”不断漏水的情景.
如图②,综合实践小组用甲、乙两个透明的竖直放置的容器和一根装有节流阀(控制水的流速)的软管,制作了类似“漏刻”的简易计时装置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4678949fb8a26cc260109502fa22ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af12320a8be4ea1051ab6c94cdb93b90.png)
记录时间 | |||||
流水时间 | 0 | 10 | 20 | 30 | 40 |
水面高度 | 30 | 29 | 28.1 | 27 | 25.8 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44dfc15d84e83f3360136808d2ba9228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af12320a8be4ea1051ab6c94cdb93b90.png)
【问题解决】
(1)利用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44dfc15d84e83f3360136808d2ba9228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b28bd43d6858bfdaafcd11051251b66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327dde48074551725e67e29882feb241.png)
(2)利用(1)中所求解析式,计算当甲容器中的水面高度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb26c5cdef6f16f4b39cd091041b439.png)
(3)经检验,发现有两组表中观察值不满足(1)中求出的函数解析式,存在偏差,小组决定优化函数解析式,减少偏差.通过查阅资料后知道:t为表中数据时,根据(1)中解析式求出所对应的函数值,计算这些函数值与对应h的观察值之差的平方和,记为w;w越小,偏差越小.请根据表中数据计算出(1)中得到的函数解析式的w值;
您最近一年使用:0次
6 . 问题解决:如图1,在矩形
中,点
,
分别在
,
上,
,
于点
.
是正方形;
(2)延长
到点
,使得
,连接
,判断
的形状,并说明理由.
类比迁移:
(3)如图2,在菱形
中,点
,
分别在
,
边上,
与
相交于点
,
,
,
,
,求
的长.
![](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/74e46fb91464159b80eab7c28a926b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f49d1de7c6dfc04b6e84e23eec0a1d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644422a7685104b3326314d657ccf9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b238947afe06e2fb5f2a98bde3bd0f01.png)
类比迁移:
(3)如图2,在菱形
![](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/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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e46fb91464159b80eab7c28a926b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f0533597752a0efee17b335e548a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0ee3db4954e8858303c2ef19307e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348fb71fbc47fd87e9ce011652ef4186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
名校
7 . 如图,
中,
,
,
,D是线段
上一个动点,以
为边在
外作等边
.若F是
的中点,连接
,则
的最小值为______ .
![](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/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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7日内更新
|
133次组卷
|
2卷引用:2024年广西南宁市第三中学初中部6月初中毕业班学业水平适应性测试数学试题
8 . 【探究题】在
中,
,
.点P是平面内不与点A,C重合的任意一点.连接
,将线段
绕点P逆时针旋转
得到线段
,连接
.
如图1,当
时,猜想
的值为________,并说明理由.
(2)类比猜想
如图2,当
时,请求出
的值.
(3)解决问题
当
时,若点E,F分别是
的中点,点P在直线
上,请直接写出点C,P,D在同一直线上时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cb7855581a61f1844bd4e66976176dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c029e4ab80f8a2080d59ba73841f364f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f13a7378345a129a03b37ee0a3f31b.png)
如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9746e5dc91718774788551c824ac61.png)
(2)类比猜想
如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9746e5dc91718774788551c824ac61.png)
(3)解决问题
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fbe5136af48052cbc5f76ab45e37348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9177a88d6ce68c84a63dd26224ab5bc8.png)
您最近一年使用:0次
9 . 如图,正方形
的边长为a,点E、F分别在
、
上,且
,
与
相交于点G,连接
,则
的最小值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3adea2cdc3b64f1bf79265d4cb1425ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
您最近一年使用:0次
2024-06-09更新
|
113次组卷
|
4卷引用:广西壮族自治区南宁市青秀区2023-2024学年八年级下学期期中数学试题
10 . 问题提出:
(1)如图1,在正方形
中,E,F分别为边
,
上的点,
,连接
,试说明线段
和
之间的数量关系.
小明是这样思考的:将
绕点A按顺时针方向旋转
得到
(如图2),此时
即是
,直接写出线段
和
之间的数量关系:____________________.
问题探究:
(2)如图3,在直角梯形
中,
(
),
,E是边
上的一点.若
,求
的长.
问题解决:
(3)某小区想在一块不规则的空地上修建一个花园,根据设计要求,花园由一个三角形和一个正方形组成,如图4所示,已知
,以
为边作正方形
,现要在花园里修建一条小路
,为了满足观赏需求,小路
要尽可能长,求出此时
的度数及小路
的最大值.
(1)如图1,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343f75e17b862051b15696334fec1eff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
小明是这样思考的:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc727c642cbc2181476b7dd8eca471e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4eef107fa9d4cedabdf5906c627cce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343f75e17b862051b15696334fec1eff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
问题探究:
(2)如图3,在直角梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edbc662cc4dcb32013d472cc7594bb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5b83a606c6263437700ece4f4691b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c182b802b2ff1b0d31e6337fb887388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
问题解决:
(3)某小区想在一块不规则的空地上修建一个花园,根据设计要求,花园由一个三角形和一个正方形组成,如图4所示,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd540caa062702a121f3ad4210c822c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d498a0467ff3c577a7ed175d7bffd885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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