2022年平行四边形矩形菱形正方形试题 .pdf

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1、专题 4：平行四边形、矩形、菱形、正方形试题一、基础训练1（2009年 常 德 市）下列命题中错误的是（）A两组对边分别相等的四边形是平行四边形B对角线相等的平行四边形是矩形C一组邻边相等的平行四边形是菱形D一组对边平行的四边形是梯形2在下列命题中，是真命题的是（）A两条对角线相等的四边形是矩形B两条对角线互相垂直的四边形是菱形C两条对角线互相平分的四边形是平行四边形D两条对角线互相垂直且相等的四边形是正方形3（2009 威海）如图，在四边形ABCD中，E是BC边的中点，连结DE并延长，交AB的延长线于F点，ABBF添加一个条件，使四边形ABCD是平行四边形你认为下面四个条件中可选择的是（）【

2、关键词】平行四边形的判定AADBC B CDBFCAC D FCDE4（2009 白银市）如图 6，四边形 ABCD 是平行四边形，使它为矩形的条件可以是5.（2009年 莆 田）如 图，菱 形ABCD的 对 角 线 相 交 于 点O，请 你 添 加 一 个 条件：，使得该菱形为正方形A B C D D C B A O O E B A F C D 6（2009年 新 疆）如 图，EF，是 四 边 形ABCD的 对 角 线AC上 两 点，AFCEDFBEDFBE，【关键词】平行四边形的性质,判定求证：（1）AFDCEB（2）四边形ABCD是平行四边形7（2009 年广西钦州）（1）已知：如图1，

3、在矩形ABCD 中，AFBE求证：DE CF；ADCB图 1FE8(2009 年牡丹江市)如图，ABCD中，E、F分别为BC、AD边上的点，要使BFDE，需添加一个条件：【关键词】平行四边形的性质9、（2009 东营）如图，在ABCD中，已知AD8，AB6，DE平分ADC交BC边于点E，则BE等于（）A.2cm B.4cm C.6cm D.8cm 10（2009年 湖 南 长 沙）如 图，矩 形ABCD的 两 条 对 角 线 相 交 于 点O，602AOBAB，则矩形的对角线AC的长是（）A2 B4 C2 3D4 3A B C E D F A B C D E A B D E F C 文档编码:

4、CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6

5、Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9

6、 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8

7、Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1

8、 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U

9、1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U

10、1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U111(2009 年河北)如图 1，在菱形ABCD 中，AB=5，BCD=120，则对角线 AC 等于（）A20 B15 C10 D5 12.（2009 年滨州）顺次连接对角线互相

11、垂直的四边形的各边中点，所得图形一定是（）A矩形B直角梯形C菱形D正方形13.（2009 年天津市）我们把依次连接任意一个四边形各边中点所得的四边形叫做中点四边形若一个四边形ABCD的中点四边形是一个矩形，则四边形ABCD可以是【关键词】矩形、正方形、菱形的性质及判定14（2009 年茂名）6杨伯家小院子的四棵小树EFGH、刚好在其梯形院子ABCD各边的中点上，若在四边形EFGH种上小草，则这块草地的形状是（）A平行四边形B矩形C正方形D菱形二、强化训练15.（2009 年重庆市江津区）如图：在菱形ABCD 中，AC6,BD8,则菱形的边长为（）A.5 B.10 C.6 D.8 16.（200

12、9 年长沙）如图，矩形ABCD的两条对角线相交于点O，602AOBAB，则矩形的对角线AC的长是（）A2 B4 C2 3D4 3O D C A B O D C A B 第 14 题B A C D 文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10

13、U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2

14、U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码

15、:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S

16、6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P

17、9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R

18、8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H

19、1 ZZ10U1B8Q2U117.（2009 年郴州市）如图2 是一张矩形纸片ABCD，AD=10cm，若将纸片沿DE 折叠，使DC 落在 DA 上，点 C 的对应点为点F，若 BE=6cm，则 CD=（）A4cmB6cmC8cmD10cm18.（2009 年湖北荆州）如图，将边长为8 的正方形ABCD 折叠，使点D 落在 BC 边的中点 E 处，点 A 落在 F 处，折痕为MN，则线段CN 的长是（）A3cmB4cmC5cmD6cm19（2009 年）如图6，在ABCD 中，AB=6，AD=9，BAD 的平分线交BC 于点 E，交 DC 的延长线于点F，BG AE，垂足为G，BG=24，则

20、CEF 的周长为（）A.8 B.9.5 C.10 D.11.5 20.（2009 年兰州）如图7 所示，将一张正方形纸片对折两次，然后在上面打3 个洞，则纸片展开后是21.（2009 年济南）如图，矩形ABCD中，35ABBC，过对角线交点O作OEAC交AD于E，则AE的长是（）A1.6 B2.5 C3 D 3.4 N M F E D C B A FEDBACABCD文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 Z

21、Z10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B

22、8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文

23、档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX

24、10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6

25、E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 H

26、Q5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8

27、J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U122.（2009 年济宁市）“赵爽弦图”是四个全等的直角三角形与中间一个小正方形拼成的大正方形.如图，是一“赵爽弦图”飞镖板，其直角三角形的两条直角边的长分别是2 和 4.小明同学距飞镖板一定距离向飞镖板投掷飞镖（假设投掷的飞镖均扎在飞镖板上）,则投掷一次飞镖扎在中间小正方形区域（含边线）的概率是A.12B.14C.15D.11023.（2009 年衡阳市）如图，矩形纸片ABCD 中，AB=4，

28、AD=3，折叠纸片使AD 边与对角线 BD 重合，折痕为DG，则 AG 的长为（）A1 B34C23D2 24.（2009 年杭州市）如图，在菱形ABCD 中，A=110，E，F 分别是边AB 和 BC 的中点，EPCD 于点 P，则 FPC=（）A35B45C50D55A D E P C B F AG D B C A 文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6

29、E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 H

30、Q5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8

31、J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 Z

32、Z10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B

33、8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文

34、档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX

35、10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U125.（2009 仙桃）将矩形纸片ABCD 按如图所示的方式折叠，AE、EF 为折痕，BAE30，AB3，折叠后，点C 落在 AD 边上的 C1处，并且点B 落在 EC1边上的 B1处则 BC 的长为（）A、3B、2 C、3 D、3226（2009 四川绵阳）如图，四边形 ABCD 是矩形，AB:AD=4:3，把矩形沿直线AC 折叠，点 B 落在点 E 处，连接 DE，则 DE:ACA1:3 B3:8 C8:27 D7:25 27（2009

36、东营）如图所示，把一个长方形纸片沿EF 折叠后，点D，C 分别落在D，C的位置若EFB 65，则 AED 等于（）（A）70 （B）65 （C）50 （D）25 28.(2009成都)如图，将矩形ABCD 沿 BE 折叠，若 CBA=30则 BEA=_ABCDEA29.(2009 年本溪)如图所示，菱形ABCD中，对角线ACBD、相交于点O，H为AD边中点，菱形ABCD的周长为24，则OH的长等于3【关键词】菱形的周长E D B CF C DA A B C D E 文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8

37、Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1

38、 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U

39、1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U

40、1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:

41、CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6

42、Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9

43、 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U130.（2009 年烟台市）如图，将两张长为8，宽为 2 的矩形纸条交叉，使重叠部分是一个菱形，容易知道当两张纸条垂直时，菱形的周长有最小值8，那么菱形周长的最大值是31.（2009 贺州）如图，正方形ABCD 的边长为1cm，E、F 分别是 BC、CD 的中点，连接BF、DE，则图中阴影部分的面

44、积是cm232（2009 肇庆）如图，ABCD 是正方形 G 是 BC 上的一点，DE AG 于 E，BF AG于 F（1）求证：ABFDAE；（2）求证：DEEFFBA D E F C G B B C E A D F O B A H C C 文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S

45、6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P

46、9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R

47、8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H

48、1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10

49、U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2

50、U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码:CX10S6Z6E2P9 HQ5R8Y8J1H1 ZZ10U1B8Q2U1文档编码