1 . 如图,在菱形
中,对角线
、
相交于点
,
,
,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/6b5b5c42-e28d-427d-89c2-60a5417ba203.png?resizew=208)
(1)求证:四边形
是矩形
(2)若
,
,求菱形
底边上的高.
![](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/7acc0628dabbbaa929b7437021cad8a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a78e006003b83147e901b34688a7f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/6b5b5c42-e28d-427d-89c2-60a5417ba203.png?resizew=208)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3740e101f0d49f386901c49f55efbc0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa1b519e1c71e72fc08e9d8fc8271cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b74e2b6dae540571fdd509c4e966b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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名校
2 . 如图,矩形ABCD中,AC与BD交于点O,BE⊥AC,CF⊥BD,垂足分别为E, F.
(1)求证:BE=CF.
(2)若∠AOB=60°,AB=8,求矩形的面积.
(1)求证:BE=CF.
(2)若∠AOB=60°,AB=8,求矩形的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/6a4e8a32-4997-4316-b24c-434fa21c9a85.png?resizew=173)
您最近一年使用:0次
2021-03-22更新
|
649次组卷
|
8卷引用:山东省青岛5中2019九年级第一学期北师大数学上册第一章_特殊平行四边形_典型例题
山东省青岛5中2019九年级第一学期北师大数学上册第一章_特殊平行四边形_典型例题北京市昌平区新学道临川学校2020-2021学年九年级上学期期末数学试题湖南省株洲市景弘中学2021-2022学年八年级下学期期中考试数学试题2022年贵州省遵义市新蒲新区初中生毕业认定测试(三模)数学试卷2022年贵州省遵义市汇川区中考三模数学试题山东省泰安市岱岳区2021-2022学年八年级下学期期中数学试题(已下线)第一章 特殊平行四边形 章末测试卷(提升卷)-2023-2024学年九年级数学上册《知识解读·题型专练》(北师大版)2023年贵州省铜仁市第三中学中考数学三模模拟试题
3 . 如图,在
中,过点D作
于点E,点F在边
上,
,连接
.
(1)求证:四边形
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/f7471451108cf5d0fbb66e8819759a6f.png)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea55228f7a36c5cdd6fcab0f950ab41.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2021/3/17/2679936607223808/2682941264265216/STEM/292dff560b8e485bbe73ae40eb442ac0.png?resizew=205)
您最近一年使用:0次
2021-03-22更新
|
883次组卷
|
3卷引用:四川省广安市岳池县2019-2020学年八年级下学期期末数学试题
四川省广安市岳池县2019-2020学年八年级下学期期末数学试题西藏自治区林芝市2020-2021学年八年级下学期期末数学试题(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)
4 . 在四边形
中,
,
.
![](https://img.xkw.com/dksih/QBM/2021/3/15/2678253770194944/2678293031444480/STEM/8bd461b7-3106-4622-81b6-20a58cf5d24e.png)
(1)P为边
上一点,如图,将
沿直线
翻折至
的位置(点B落在点E处)
①当点E落在
边上时,利用尺规作图,作出满足条件的图形,并直接写出此时
_________;
②若点P为
边的中点,连接
,则
与
有何位置关系?请说明理由;
(2)点Q为射线
上的一个动点,将
沿
翻折,点D恰好落在直线
上的点
处,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529188246973b6851b114466a238fc0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900d409ddc0930a9c560152f78352305.png)
![](https://img.xkw.com/dksih/QBM/2021/3/15/2678253770194944/2678293031444480/STEM/8bd461b7-3106-4622-81b6-20a58cf5d24e.png)
(1)P为边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099dd87a526391f830ac2a11e7d7ad56.png)
①当点E落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
②若点P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(2)点Q为射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41984f53bb280ba8b5ac00a52ce2825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
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5 . 如图,已知菱形
的对角线
,
交于点
,分别过点
,
作
,
的垂线,两垂线交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/bf91d4c2-3901-4721-afad-93e9587d115b.png?resizew=155)
(1)请判断四边形
的形状并给出证明;
(2)若四边形
的面积为12,点
是四边形
对角线
的中点,且
,请计算四边形
的周长.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/bf91d4c2-3901-4721-afad-93e9587d115b.png?resizew=155)
(1)请判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3827554ef88bce8ae0e3755b07443080.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3827554ef88bce8ae0e3755b07443080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3827554ef88bce8ae0e3755b07443080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc44fd8465b740d54ca1d69dbd06ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3827554ef88bce8ae0e3755b07443080.png)
您最近一年使用:0次
2021-03-08更新
|
247次组卷
|
2卷引用:河南省郑州市新郑市2020-2021学年九年级上学期期中数学试题
6 . 已知:在矩形
中,
,
,四边形
的三个顶点E、F、H分别在矩形
的边
、
、
上.
(1)如图1,四边形
为正方形,
,求
的长.
(2)如图2,四边形
为菱形,设
,
的面积为S,且S与x满足关系式
求自变量x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
(1)如图1,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5f736b1195fef1d2d300168a795f1.png)
(2)如图2,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bc55510792f8bd30e1c0686609fe3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4364713d318c134525c76816cac75f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a07e4d2c13cf4b452d329b35bdc70d7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/8140e51d-aca6-4a04-9a37-1e645791f5f7.png?resizew=323)
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19-20八年级下·浙江杭州·期中
7 . 如图1,在长方形
中,
,
,点E,F分别从点C,B同时出发,点E在边
上运动,点F在射线
上运动,
.
.
![](https://img.xkw.com/dksih/QBM/2021/2/2/2649315374882816/2649447192993792/STEM/574ceb249be44859b1aea29d5654811c.png?resizew=391)
(1)当点F在线段
上运动时,求线段
的长(用含m的代数式表示).
(2)若P是
边上一点,在点E的运动过程中,是否存在m的值,使得以P,D,E,F为顶点的四边形是平行四边形?若存在,求出m的值;若不存在,请说明理由.
(3)如图2,连结
,把
沿
翻折得到
.若
与长方形
的边平行,则点
到直线
的距离是_________(直接写出答案).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a91146605aff8a321203a5907143cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45723dce96b74f027adcb1a4ecd19db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b851efc3de7a3e31d7f4e666246bca55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7647642cc6eb6c116b7360f5650311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bb6f7f8126875d984f1253c7c9391b1.png)
![](https://img.xkw.com/dksih/QBM/2021/2/2/2649315374882816/2649447192993792/STEM/574ceb249be44859b1aea29d5654811c.png?resizew=391)
(1)当点F在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)若P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)如图2,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8bb1e2dbfd5c00e6a5432bb288265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557f8ff92d79a9d464ff13de17f3eae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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8 . 在平行四边形ABCD中,过点D作DE⊥AB于点E,点F在边CD上,DF=BE,连接AF,BF.
(1)求证:四边形BFDE是矩形;
(2)若CF=9,BF=12,DF=15,求证:AF平分∠DAB.
(1)求证:四边形BFDE是矩形;
(2)若CF=9,BF=12,DF=15,求证:AF平分∠DAB.
![](https://img.xkw.com/dksih/QBM/2021/1/13/2635342399840256/2639396583661568/STEM/ccae5d45b58249bb99b6eb992acba4d9.png?resizew=191)
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名校
9 . 如图,在平面直角坐标系中,四边形OABC是直角梯形,
,
,
,
,现有一动点P从点A出发,以每秒2个单位长度的速度沿AO方向,经O点再往OC方向移动,最后到达C点.设点P移动时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/9e0b7863-aa28-4cad-a506-e0f3687911ef.png?resizew=228)
(1)求点B的坐标;
(2)当t为多少时,
的面积等于13;
(3)在(2)的条件下,取BP中点M,在x轴上找一点N,使
和最小,求此时N点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e1f5542b5ecf85b5bcc33e1d24cb2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8fd1ce0df99890a2147191d6fe8961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec32b9cfee142d1d4f68ab4771de77c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/9e0b7863-aa28-4cad-a506-e0f3687911ef.png?resizew=228)
(1)求点B的坐标;
(2)当t为多少时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9cc98e6df306063e645044f0faa7d.png)
(3)在(2)的条件下,取BP中点M,在x轴上找一点N,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03776cc5192156a3f3ed094c8ad5e426.png)
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10 . 如图,
中,
,
,点D,E,分别在CA,BC的延长线上,且
.过点C作
,垂足为F,FC的延长线交AB的延长线于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/d20cc86e-762c-48c5-8ec1-230c2d7347b2.png?resizew=241)
(1)求证:
;
(2)①在图中找出与CG相等的线段,并证明;
②探究线段AG、BG、DE之间的数量关系(直接写出);
(3)若
.求
的值(用含k的代数式表示).
![](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/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42218a68301d770accaaefb96b19f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cc087c22e1fc1197236c71e5465d33.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/d20cc86e-762c-48c5-8ec1-230c2d7347b2.png?resizew=241)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e71cbf0513ddc87a4ba391e295d229b.png)
(2)①在图中找出与CG相等的线段,并证明;
②探究线段AG、BG、DE之间的数量关系(直接写出);
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788cfc04a1b49ab3099a18e29678e104.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad75d52164547b022d8c895205a6c84.png)
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