如图,在
中,过点D作
于点E,点F在边
上,
,连接
.
是矩形;
(2)已知
,
是
的平分线,若
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607cfabc1d421835b6b64109ad18f571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e1278edd78fdf615ba5e93f5a4fa2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
18-19八年级下·全国·单元测试 查看更多[31]
人教版 八年级数学下册 第十八章 平行四边形 单元检测卷人教版八年级数学下册 第十八章 平行 四边形 单元测试卷黑龙江省绥化市海伦市红光农场学校2019-2020学年九年级上学期期中数学试题(已下线)【南昌新东方】2020年育华八年级下数学期中试卷 72020年江苏省扬州中学教育集团树人学校九年级三模数学试题山东省东营市垦利区2019-2020学年八年级下学期期末数学试题山西省吕梁市兴县2019-2020学年八年级下学期期末教学质量测试数学试题2021年吉林省长春市绿园区中考二模数学试题湖南省长沙市开福区青竹湖湘一外国语学校2019-2020学年八年级下学期期末数学试题山东省德州市陵城区2020-2021学年八年级期中数学试题湖南省永州市新田县2020-2021学年八年级下学期期末数学试题(已下线)北京市第四中学2021-2022学年九年级上学期9月数学开学测试试题江苏省泰州市姜堰区实验初级中学2020-2021学年八年级上学期9月月考数学试题新疆维吾尔自治区阿克苏地区2021-2022学年八年级下学期期末数学试题贵州省贵阳市贵安区高峰中学2022-2023学年九年级上学期10月月考数学试题第六章特殊平行四边形鲁教版(五四制)八年级下册数学试题(已下线)专题5.1 矩形-【帮课堂】2022-2023学年八年级数学下册同步精品讲义(浙教版)湖南省邵阳市北塔区2022--2023学年八年级下学期数学试卷期卷湖南省湘西州吉首市2022-2023学年八年级下学期期末数学试题云南省昆明市西山区昆明师范专科学校附属中学2022-2023学年八年级下学期6月月考数学试题山东省济宁市金乡县2022-2023学年八年级下学期期末数学试题(已下线)山东省济宁市鱼台县2022-2023学年八年级下学期期末数学试题(已下线)专题1.14 特殊平行四边形(全章分层练习)(提高练)-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)辽宁省抚顺市新宾满族自治县2021-2022学年八年级下学期期中数学试题(已下线)专题24.4 含30度角的直角三角形五大题型-2023-2024学年九年级数学上册举一反三系列(华东师大版)(已下线)期中复习与测试(1)(第1-4章)-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)四川省成都市青羊区四川师范大学实验外国语学校2023-2024学年九年级上学期期中数学试题(已下线)第18章 平行四边形(单元测试·基础卷)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)云南省昆明市西山区2022-2023学年八年级下学期期末数学试题江苏省泰州市姜堰区实验初级中学2023-2024学年八年级下学期数学月考题甘肃省陇南市武都区城关中学2023-2024学年八年级下学期4月期中数学试题
更新时间:2023-10-01 09:49:54
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相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
垂直平分
,分别交
,
于点D,E,
平分
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/cfc19fef-2273-48ec-b320-57827fec0f1f.png?resizew=157)
(1)求证:
为直角三角形;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/cfc19fef-2273-48ec-b320-57827fec0f1f.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f341b98caabf99bc683ce8407068735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-问答题
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适中
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名校
【推荐2】阅读情境:
在综合实践课上,同学们探究“全等的等腰直角三角形图形变化”问题.
,其中
,
,此时,点C与点E重合,
操作探究1
(1)小凡将图1中的两个全等的
和
的按图2方式摆放,点
落在
上,
所在直线交
所在直线于点
,连结
,直接写出线段
与线段
的数量关系是 .
操作探究2
(2)小彬将图1中的
绕点A按逆时针方向旋转角度
,然后分别延长
,
,它们相交于点F.
如图3,在操作中,小彬提出如下问题,请你解答:
①当
°时,
.(直接回答即可)
②
时,直接写出线段
的长为 ;
操作探究3
(3)小颖将图1中的
绕点A按顺时针方向旋转角度
,线段
和
相交于点F,在操作中,小颖提出如下问题,请你解答:
①如图4,当
时,线段
的长为多少?并说明理由;
②当旋转到点F是边
的中点时,直接写出线段
的长为 .
在综合实践课上,同学们探究“全等的等腰直角三角形图形变化”问题.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f03a43549ab71f0998fffbcb48397b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69590ff4327d97efe098ca7ecc9c2cd.png)
操作探究1
(1)小凡将图1中的两个全等的
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
操作探究2
(2)小彬将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b40aa8d2482d698ebef69cf225f99f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
如图3,在操作中,小彬提出如下问题,请你解答:
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9251dff989f7d60db751b73033dee269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5048da25cfba78c683d4dec68f0771.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c96cb3ac8290e09c55d4eb336a8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
操作探究3
(3)小颖将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54fa68ac228e5b09a024e6f238f5e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
①如图4,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b235c077d324c45527cee213a48c1fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
②当旋转到点F是边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在Rt△ABC中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/a527b939-3c62-4369-ad7c-e90df2345dc1.png?resizew=166)
(1)尺规作图:在
边上求作点
,使
(保留作图痕迹,不写作法);
(2)在(1)的条件下,连接
.若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/a527b939-3c62-4369-ad7c-e90df2345dc1.png?resizew=166)
(1)尺规作图:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3191de4f76ca040372bef266d3632213.png)
(2)在(1)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】已知四边形
和四边形
都是正方形,且
.
(1)如图1,连接
、
.求证:
;
(2)如图2,如果正方形
的边长为2,将正方形
绕着点
旋转到某一位置时恰好使得
,
.
①求
的度数;
②正方形
的边长的值为________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802da09a4f543fd35c42416b1f5018dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/9ddce91e-f728-4f80-85bc-3cc531dfc08a.png?resizew=467)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b555a0bb6b5132ecfb9cae3769912c3.png)
(2)如图2,如果正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb842ca767fef2ea2c084a8640ac1f58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6f7091bf0bb4b27a436d7cc29ca9d.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
②正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】如图,抛物线
交
轴于
,
两点,与
轴交于点
,连接
,
.
为线段
上的一个动点,过点
作
轴,交抛物线于点
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/63f639e8-2feb-47cb-9d34-8c211b2e31ef.png?resizew=253)
(1)求抛物线的表达式;
(2)过点
作
,垂足为点
,设
点的坐标为
,请用含
的代数式表示线段
的长,并求出当
为何值时,
有最大值,最大值是多少?
(3)试探究点
在运动过程中,是否存在这样的点
,使得以
,
,
为顶点的三角形是等腰三角形,若存在,请求出此时点
的坐标;若不存在,请说明理由.
(4)在(2)的条件下,直线
上有一动点
,连接
,将线段
绕点
逆时针旋转
度,使点
的对应点
恰好落在该抛物线上,则点
的坐标是 .(直接写出结果)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee80939187a84e1863eeb192a301c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7291b3d921f595f28960abcdce6dfbed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/63f639e8-2feb-47cb-9d34-8c211b2e31ef.png?resizew=253)
(1)求抛物线的表达式;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a6922808e9b59352c25c341cf23851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8649ce18c628d0e03e72cef541f8284f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
(3)试探究点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(4)在(2)的条件下,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b2e7aa38de090bb39fa058323d2eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b2e7aa38de090bb39fa058323d2eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17161b28b6ad8f57abc5b11e1b6c671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐1】(1)尺规作图:求作平行四边形
,使得
,
;(不写作法,保留作图痕迹)
(2)请利用(1)中的图形,解决下列问题:
①若
,请用含
和
的式子表示平行四边形
的面积;
②求证:平行四边形两条对角线的平方和等于四条边的平方和.
![](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/5c52b857c7ca55dfa6da108df1d3cee2.png)
(2)请利用(1)中的图形,解决下列问题:
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
②求证:平行四边形两条对角线的平方和等于四条边的平方和.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/11/6606669f-4074-42d2-82c4-fb6ecb03daf3.png?resizew=161)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在平行四边形ABCD中,对角线AC,BD相交于点O,点M为AD的中点,过点M作
交CD延长线于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/b83c962c-a69d-4f12-b022-310e3d8420d3.png?resizew=167)
(1)求证:四边形MNDO是平行四边形;
(2)当AB,BD满足 条件,四边形MNDO是菱形;当AB,BD满足 条件,四边形MNDO是矩形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07d7a3d7f32ce2b4baa1f9346dc7e3f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/b83c962c-a69d-4f12-b022-310e3d8420d3.png?resizew=167)
(1)求证:四边形MNDO是平行四边形;
(2)当AB,BD满足 条件,四边形MNDO是菱形;当AB,BD满足 条件,四边形MNDO是矩形.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在5×6的网格中,每个小正方形的边长为1.从五边形ABCDE的边上选择4个格点(允许包含顶点),分别作一个面积为10的格点四边形,同时满足以下条件:
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932384316243968/2961403047182336/STEM/b8c685cb-9763-41fc-92c7-f38cc5090e7e.png?resizew=365)
(1)在图1中,格点四边形的两条对角线互相垂直.
(2)在图2中,格点四边形为矩形,且对角线的长度为整数.
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932384316243968/2961403047182336/STEM/b8c685cb-9763-41fc-92c7-f38cc5090e7e.png?resizew=365)
(1)在图1中,格点四边形的两条对角线互相垂直.
(2)在图2中,格点四边形为矩形,且对角线的长度为整数.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,菱形
的对角线
,
相交于点
,
,
,
是
的中点,点
,
在
上,
,
.
的面积;
(2)求证:四边形
是矩形.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53923da014e19a1d1a19ca28e20af51a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b670c6d27ce68f17ac12c4efa1933db1.png)
您最近一年使用:0次