1 . 请认真阅读下列材料,并完成相应的任务.
(1)材料中的依据为______;
(2)把材料中的证明过程补充完整;
(3)古希腊数学家帕普斯在梅文鼎证法的基础上进行了改进,如图(3),
中,
,
,以
为边作
和
,且
中
边的高为2,
的面积为6,延长
交于点R,连接
并延长,过点B作
,且
,再以
为边作
.请直接写出
中
边的高.
从毕达哥拉斯到帕普斯 毕达哥拉斯从地板的结构中发现了直角三角形的三边关系——勾股定理,之后相继有很多数学家及数学爱好者都用面积割补法给出了验证.如我国三国时期的数学家赵爽,美国第二十任总统加菲尔德等.欧几里得在《几何原本》中第一次在公理体系下给出了以三角形为“桥梁”证明勾股定理的方法:如图(1),过点A作 ![]() ![]() ![]() 先证明 ![]() ![]() 又因为 ![]() ![]() 所以 ![]() 同理得 ![]() ![]() 即 ![]() 之后,我国清代数学家梅文鼎在欧几里得证法的基础上,进行了“改进”,以平行四边形作为“桥梁”进行了证明.如图(2),延长 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ∵四边形 ![]() ![]() ∴ ![]() ![]() ![]() ∴ ![]() ∴ ![]() ![]() ∵ ![]() ∴ ![]() ∴ ![]() ∴ ![]() ∵四边形 ![]() ∴ ![]() ![]() ∵ ![]() ∴ ![]() ∴ ![]() ∴ ![]() ∵四边形 ![]() ∴ ![]() ∴四边形 ![]() ∴ ![]() ∵ ![]() ∴ ![]() ∵ ![]() ∴ ![]() ∵ ![]() ![]() ∴ ![]() |
(1)材料中的依据为______;
(2)把材料中的证明过程补充完整;
(3)古希腊数学家帕普斯在梅文鼎证法的基础上进行了改进,如图(3),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f6b2985eccf6fa89b362ea0abb3591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27bbe3eadf469c4759fecde42de44fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f6b2985eccf6fa89b362ea0abb3591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27bbe3eadf469c4759fecde42de44fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84631aa12d8a9bee105b7f73b8a79c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd58415d4a40dfd7ae911997aba705a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc055a8dbbe6944ed198c1044f03e79b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cba2c8cc5653c686a27d8cb6b69317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d37717fa5092fa37ddc8c45a57bb444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4210cf7258b643d8bda7928ca763881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4210cf7258b643d8bda7928ca763881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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2 . 综合与实践
问题情境
在综合与实践课上,老师出示了两张全等的三角形纸片
,其中
,
,
.如图
,三角形纸片
与三角形纸片
重合,然后将纸片
绕点
顺时针旋转(旋转角不超过
),
与
交于点
,
与
交于点
.
操作与计算
(
)如图
,当
时,求
的长.
深度思考
(
)“雄鹰”小组受到了启发,提出了问题:如图
,当
时,试猜想
与
的数量关系,并说明理由.
拓展探究
(
)“智慧”小组进一步研究.如图
,过点
作
的平行线交
于点
,过点
作
的平行线交
于点
,连接
.当
时,直接写出四边形
的面积.
问题情境
在综合与实践课上,老师出示了两张全等的三角形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5a1b5af8099353be1560c085ec3a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4faa61e76585aa348b6d93b8842e990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32cd85d0cc331d47061562a498325567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c2e74ba16cfbc7ae2a7b1149672e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6c9a36e2ef7189317ae652c56e49c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
操作与计算
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aad38b43462ca7a8fb9bc9484ad3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
深度思考
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7990cc55289f09c4e67860bb64bb2b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3064b70f24e9bbcab76e0dc61274b9b.png)
拓展探究
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0d584685408f8529cc9933a9a66ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b9982a8335c4d17dbedb3c8161070f.png)
您最近一年使用:0次
2024-04-23更新
|
117次组卷
|
2卷引用:2024年山西省晋中市和顺县中考一模数学试题
名校
3 . 阅读下列材料,完成后面的任务:
如图,在
和
中,点A,D在直线m上,点B,C在直线n上,若
,则有
.这道题表明,同底等高的两个三角形的面积相等,我们把这个结论称为等面积.它是一种重要的解题方法.在数学解题中,有着重要的应用.
下面是它的部分证明过程:
证明:如图,过点A作
于点E,过点D作
于点F,
则
.
∵
,
∴
,
……
(1)请将上述证明过程补充完整
(2)如图,在矩形ABCD中,E是CD延长线上一点,连接AE,BE.若
,求
.
如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fd08c188ce82b6a0074a755246badd.png)
下面是它的部分证明过程:
证明:如图,过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bcca82511be4c0d635ab8c682e3498.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307ee21121d50a81bc5169187413b117.png)
……
(1)请将上述证明过程补充完整
(2)如图,在矩形ABCD中,E是CD延长线上一点,连接AE,BE.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42e84c4755b5b385865062b47339a47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c6784571d818982d8d3fe53410bc4b.png)
您最近一年使用:0次
4 . 如图,在四边形
中,对角线
,
,且
,垂足为O,顺次连接四边形
各边的中点,得到四边形
;再顺次连接四边形
各边的中点,得到四边形
,…如此下去得到四边形
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/cb09c5a6-a340-45fb-ac64-b69a5158e09f.png?resizew=159)
(1)判断四边形
的形状,并说明理由.
(2)求四边形
的面积.
(3)直接写出四边形
的面积(用含n的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5bf350a619ef25d8d9b988f3db804e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36134f01da0f13b340e82e8835324f25.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/cb09c5a6-a340-45fb-ac64-b69a5158e09f.png?resizew=159)
(1)判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
(2)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
(3)直接写出四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36134f01da0f13b340e82e8835324f25.png)
您最近一年使用:0次
名校
5 . 已知:如图,在菱形ABCD中,对角线AC、BD相交于点O,DE∥AC,AE∥BD.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/6/7c05b514-d2fa-48bc-83eb-10763fa6cde1.png?resizew=152)
(1)求证:四边形AODE是矩形;
(2)若AB=2,DE=1,求四边形AODE的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/6/7c05b514-d2fa-48bc-83eb-10763fa6cde1.png?resizew=152)
(1)求证:四边形AODE是矩形;
(2)若AB=2,DE=1,求四边形AODE的面积.
您最近一年使用:0次
2022-04-21更新
|
317次组卷
|
8卷引用:山西省实验中学2019-2020学年九年级上学期10月月考数学试题
6 . 阅读与思考
阅读以下材料,并按要求完成相应的任务:
学习了反比例函数的性质后,希望学习小组又进行了深入的探究,发现:如果在双曲线上任取两点,过这两点分别向两坐标轴垂线(垂足不同时在
或
轴上),那么垂足的连线和这两点的连线平行.如图1,点
,
是反比例函数
在第一象限图象上的两点,作
轴于点
,
轴于点
,连接
,则
;如图2,点
,
是反比例函数
在第一象限图象上的两点,作
轴于点
,
,
轴于点
,连接
,则
.在老师指导下希望学习小组进行严格推理,证明这一结论是正确的.
【结论应用】
任务:(1)如图2,若
与
交于点
,
.
①
的值为______.
②若
的面积为
,则四边形
的面积为______.
(2)智慧学习小组利用上述结论又进行了新的探究,如图3,直线
与反比例函数
的图象交于
,
两点,点
在点
的上方,与
,
轴分别交于点
,
,则得到
这一结论.
下面是该结论的部分证明:
证明:作
轴于点
,
轴于点
,连接
,则
,
.
,四边形
是平行四边形.
……
仔细阅读上面的证明过程,按照上面的证明思路,请你补充完整.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/a7f0d6b4-9c18-4309-aa12-4ef9e7c03aa1.png?resizew=540)
阅读以下材料,并按要求完成相应的任务:
学习了反比例函数的性质后,希望学习小组又进行了深入的探究,发现:如果在双曲线上任取两点,过这两点分别向两坐标轴垂线(垂足不同时在
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45bd7e92dae1e0c2af6c33d5e202f544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602f64f0c8a0fa105d583d698d0af3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b45db8dd8768994af51206565379fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.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/45bd7e92dae1e0c2af6c33d5e202f544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d3a0273d1f3046dfad2086d0df56c0.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/05de5eef286a1b48012246c0cf88a1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
【结论应用】
任务:(1)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab0e763544f44e906d640ae118d9edd.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10517f770b668568191d1228f21eb30.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a6e2ab0a2c893dc495df33e5ee092d.png)
(2)智慧学习小组利用上述结论又进行了新的探究,如图3,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45bd7e92dae1e0c2af6c33d5e202f544.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
下面是该结论的部分证明:
证明:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602f64f0c8a0fa105d583d698d0af3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b45db8dd8768994af51206565379fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b14e543a0b4950752a4a26bec7221c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d0069af51a71d9edb74e51c912c034.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a5bb4946eaa7d297d1a7263a9b90a2.png)
……
仔细阅读上面的证明过程,按照上面的证明思路,请你补充完整.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/a7f0d6b4-9c18-4309-aa12-4ef9e7c03aa1.png?resizew=540)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/0ae4cb45-4eed-4422-aca1-3c684249bc96.png?resizew=218)
您最近一年使用:0次
7 . 如图,已知平行四边形
的对角线
、
交于点O,
是等边三角形,
.
![](https://img.xkw.com/dksih/QBM/2021/12/1/2863368118927360/2867352315518976/STEM/585140c2-12ae-462d-bdf9-7a18db48bc12.png?resizew=109)
(1)求证:平行四边形
是矩形;
(2)求平行四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://img.xkw.com/dksih/QBM/2021/12/1/2863368118927360/2867352315518976/STEM/585140c2-12ae-462d-bdf9-7a18db48bc12.png?resizew=109)
(1)求证:平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2021-12-07更新
|
552次组卷
|
18卷引用:山西省朔州市右玉县二中2018-2019学年八年级下学期期末数学试题
山西省朔州市右玉县二中2018-2019学年八年级下学期期末数学试题(已下线)【万唯原创】矩形、菱形、正方形·满分特训(三)(已下线)【万唯原创】2021年山西试题研究-练册-第五章2陕西省西安市雁塔区音乐学院附属中等音乐学校2019届九年级(上)期中数学试卷【区级联考】湖北省武汉市青山区2017-2018学年八年级下学期期末考试数学试题湖北省武汉开发区三中2019-2020学年八年级下学期5月月考数学试题广西河池市环江县2018-2019学年八年级下学期期末数学试题(已下线)【万唯原创】矩形、菱形和正方形·满分特训(一)安徽省芜湖市无为市2020-2021学年八年级下学期期末数学试题湖北省十堰市郧西县2020-2021学年八年级下学期期末数学试题广西壮族自治区河池市南丹县2020-2021学年八年级下学期期末数学试题广东省茂名市高州市2021-2022学年九年级上学期期中数学试题甘肃省金昌市金川区第五中学2020-2021学年八年级下学期期中考试数学试题(7-8班)(已下线)第02讲 矩形的性质与判定-【暑假自学课】2022年新九年级数学暑假精品课(北师大版)山东省聊城市冠县2021-2022学年八年级下学期期中考试数学试题江苏省南通市启东市2021-2022学年八年级下学期期末数学试题(已下线)2022年湖北省十堰市中考数学真题变式题21-25题(已下线)专题04 矩形、菱形和正方形(十二种考法)-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(湖南专用)
8 . 如图所示,在等边三角形
中,
分别是边
,
的中点.连接
,
,过点
作
的平行线交
的延长线于点
,连接
.
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586372156088320/2588027229290496/STEM/82a9a9792f1b445fa604570892b26587.png?resizew=148)
(1)求证:四边形
是矩形;
(2)若
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe964aa3574061970c9c8066df21c89.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586372156088320/2588027229290496/STEM/82a9a9792f1b445fa604570892b26587.png?resizew=148)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
您最近一年使用:0次
9 . 实践与探究
宽与长的比是
(约0.618)的矩形叫做黄金矩形.黄金矩形给我们以协调、均匀的美感.世界各国许多著名的建筑,为取得最佳的视觉效果,都采用了黄金矩形的设计.
下面我们通过折纸得到黄金矩形.
第一步,在一张矩形纸片的一端,利用图1的方法折出一个正方形,然后把纸片展平.
![](https://img.xkw.com/dksih/QBM/2019/7/18/2249422599266304/2249632858472448/STEM/b3fb5cfbd90b490f91eb0b43524af981.png?resizew=387)
第二步,如图2,把这个正方形折成两个相等的矩形,再把纸片展平,折痕是
.
第三步,折出内侧矩形的对角线
,并把
折到图3中所示的
处,折痕为
.
第四步,展平纸片,按照所得的点
折出
,使
;过点
折出折痕
,使
.
![](https://img.xkw.com/dksih/QBM/2019/7/18/2249422599266304/2249632858472448/STEM/904388c95e1945a18b37934a104c1847.png?resizew=431)
(1)上述第三步将
折到
处后,得到一个四边形
,请判断四边形
的形状,并说明理由.
(2)上述第四步折出折痕
后得到一个四边形
,这个四边形是黄金矩形,请你说明理由.(提示:设
的长度为2)
(3)在图4中,再找出一个黄金矩形_______________________________(黄金矩形
除外,直接写出答案,不需证明,可能参考数值:
)
(4)请你举一个采用了黄金矩形设计的世界名建筑_________________________.
宽与长的比是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d393bb07b7140905b85f550519de4.png)
下面我们通过折纸得到黄金矩形.
第一步,在一张矩形纸片的一端,利用图1的方法折出一个正方形,然后把纸片展平.
![](https://img.xkw.com/dksih/QBM/2019/7/18/2249422599266304/2249632858472448/STEM/b3fb5cfbd90b490f91eb0b43524af981.png?resizew=387)
第二步,如图2,把这个正方形折成两个相等的矩形,再把纸片展平,折痕是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
第三步,折出内侧矩形的对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
第四步,展平纸片,按照所得的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77bf852fc5d02f4dda6c99d6d3264d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50361ca396064eb459fbd13cb910517.png)
![](https://img.xkw.com/dksih/QBM/2019/7/18/2249422599266304/2249632858472448/STEM/904388c95e1945a18b37934a104c1847.png?resizew=431)
(1)上述第三步将
![](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/d498a0467ff3c577a7ed175d7bffd885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d498a0467ff3c577a7ed175d7bffd885.png)
(2)上述第四步折出折痕
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf2fa3cb87267ee5f968c2a9362d216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)在图4中,再找出一个黄金矩形_______________________________(黄金矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf2fa3cb87267ee5f968c2a9362d216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840ea6bc07b112930a367fa5dab8ad30.png)
(4)请你举一个采用了黄金矩形设计的世界名建筑_________________________.
您最近一年使用:0次
10 . 如图,矩形ABCD中,延长AB至E,延长CD至F,BE=DF,连接EF,与BC、AD分别相交于P、Q两点.
(1)求证:CP=AQ;
(2)若BP=1,PQ=2
,∠AEF=45°,求矩形ABCD的面积.
(1)求证:CP=AQ;
(2)若BP=1,PQ=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/23/7eb20483-a043-4eca-ba38-9289d719e50e.png?resizew=162)
您最近一年使用:0次
2017-04-02更新
|
1066次组卷
|
10卷引用:【万唯原创】2018年山西-试题研究-章节检测卷5 四边形
(已下线)【万唯原创】2018年山西-试题研究-章节检测卷5 四边形(已下线)【万唯原创】2017年山西中考数学-试题研究-章节检测卷5 四边形2017届江苏省盐城市盐都区实验学校九年级下学期第一次学情调研数学试卷2017届山东省济宁市高中阶段教育学校统一招生考试数学模拟试卷(已下线)2年中考1年模拟 第四篇 图形的性质 专题19 全等三角形人教版八年级下册 第十八章 平行四边形单元复习卷云南省玉溪市红塔区第一学区2018-2019学年八年级下学期期中考试数学试题(已下线)【万唯原创】2017年陕西-试题研究-练习册19贵州省遵义市红花岗区第二初级中学2021-2022学年八年级下学期期中数学试题河南省信阳市淮滨县2023-2024学年八年级下学期期中数学试题