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1、第十四期:四边形平行四边形是初中数学重要内容之一,有关平行四边形的题目在中考中也备受青睐,综观近几年中考试题,围绕四边形内容设计了一些新颖别致的考题,特别是开放题特别多,形式比较多样,分值一般在6-9 分左右。知识点 1:平行四边形的性质与判定例 1:如图 1,ABCD中,E、F分别为BC、AD边上的点,要使BFDE,需添加一个条件:思路点拨:本题考查平行四边形的判定条件。平行四边形的判定方法主要有以下几种:1 一组对边平行且相等的四边形是平行四边形2:两组对边分别相等的四边形是平行四边形3:两组对角分别相等的四边形是平行四边形4:对角线互相平分的四边思路点拨:根据平行四边形的性质:对边平行且
2、相等可以得出AB=CD=6,AD=BC=8 根据等角对等边可以知道CE=CD=6,所以 BE=2 答案:A 练习1.如图 3,ABC D中,AC BD为对角线,BC6,BC边上的高为4,则阴影部分的图 2 A B C E D F 图 1 面积为()A3 B6 C12 D24 2.如图 4 所示,在ABCDY中,对角线ACBD、相交于点O,过点O的直线分别交ADBC、于点MN、,若CON的面积为2,DOM的面积为4,则AOB的面积为答案:1.C 2.6 最新考题1.(2010 年威海)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
3、ABCD是平行四边形你认为下面四个条件中可选择的是()AADBC B CDBFCAC D FCDE2.(2010 年广西钦州)如图,在ABCD中,A120,则D_ _.ABCD答案 1.D 2.60 知识点 2:特殊四边形的性质与判别例 1:如图 5,四边形ABCD是平行四边形,使它为矩形的条件可以是A D C B E B A F C D 图 3 O 图 4 文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3
4、R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y
5、10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W
6、7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8
7、S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD
8、4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC
9、4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6
10、C8S3R5O9文档编码:CD4Y10C5F1I7 HC4W7Z7D3K2 ZN6C8S3R5O9思路点拨:本题考查同学们对平行四边形的性质和矩形条件的掌握。可以添加对角线相等或者有一个角是直角。答案:答案不唯一,如AC=BD,BAD=90o等例 2:如图 6,点E是菱形ABCD的对角线BD上的任意一点,连结AECE、请找出图中一对全等三角形为_(用含自然数n的式子表示)思路点拨:本题考查正方形中的探索规律问题,由题意知,点P运动一周路程为4,点P从A点出发,当运动的路程是2008 时,点P恰好回到点A,所以当运动路程为2010 年时,点P所在位置是点B,点P从点A运动到点D运动的路程是3,当
11、运动n圈后,点P走的路程为 4n3,故填点B;4n3答案:4n3 练习1.如图 8,在菱形ABCD中,AB=5,BCD=120,则对角线AC等于()图 7 BDA(P)C图 6 文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C
12、4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY
13、1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C
14、4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY
15、1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C
16、4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY
17、1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6A20 B15 C 10 D5 2.如图 9,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 C 3 D3.4 3.如图 10,
18、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答案:1.D 2.D 3.ABBC或ACBD或AOBO等最新考题1.(2010 年山西省)如图(1),把一个长为m、宽为n的长方形(mn)沿虚线剪开,拼接成图(2),成为在一角去掉一个小正方形后的一个大正方形,则去掉的小正方形的边长为()A2mnBmnC2mD2n2.(2010年 黑龙江大兴安岭)在矩形ABCD中,1AB,3AD,AF平分DAB,过C点作BDCE于E,延长AF、EC交于点H,下列结论中:FHAF;BFBO;CHCA;EDBE3,正确的是()m n n n(2)(1)B A C D 图 8 A B C D D
19、C B A O 图 10 O 图 9 文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文
20、档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N
21、2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文
22、档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N
23、2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文
24、档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N
25、2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6D A C B AABC D答案:1.A 2.D知识点 3:梯形的性质与判别例 1:如图 11,在四边形ABCD中,已知AB不平行CD,ABDACD,请你添加一个条件:,使得加上这个条件后能够推出ADBC且ABCD.答案:C 练习1.如图 12,梯形ABCD中,ADBC,DCBC,将梯形沿对角线BD折叠,点A恰好落在DC
26、边上的点A处,若ABC20,则ABD的度数为()A.15 B.20 C.25 D.30 2.如图 13,在等腰梯形ABCD中,ADBC,对角线AC、BD相交于点O,以下四个结论:OHEFDCAB图 12 图 13 文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U
27、6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M
28、6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U
29、6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M
30、6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U
31、6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M
32、6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6DCBABC,OA=OD,BDCBCD,SAOB=SDOC,其中正确的是A.B.C.D.答案:1.C.因为 A BC 20,则 BA C 70,D
33、A B 110,DAB 110,ABC 70,则 A BD=25;2.D 最新考题1.(2010 年淄博市)如图,梯形ABCD中,ABC和DCB的平分线相交于梯形中位线EF上的一点P,若EF=3,则梯形ABCD的周长为(C)A9 B10.5 C12 D15 2.(2010年武汉)在直角梯形ABCD中,ADBC,90ABCABBCE,为AB边上一点,15BCE,且AEAD连接DE交对角线AC于H,连接BH下列结论:ACDACE;CDE为等边三角形;2EHBE;EDCEHCSAHSCH其中结论正确的是()A只有B只有C只有D答案:1.C 2.BA B C D E F P D C B E A H 文
34、档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N
35、2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文
36、档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N
37、2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文
38、档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N
39、2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文
40、档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6过关检测一、选择题1下列命题中正确的是()(A)对角线互相平分的四边形是菱形(B)对角线互相平分且相等的四边形是菱形(C)对角线互相垂直的四边形是菱形(D)对角线互相垂直平分的四边形是菱形2在梯形ABCD 中,AD BC,对角线 AC BD,且 AC=12,BD=9,则梯形的高为()(A)30 (B)15 (C)7.5 (D)7.2 3如图,已知矩形ABCD
41、中,E、F 分别是 AP、RP的中点,当P在 BC上从 B向 C移动而 R不动时,那么下列结论正确的是()(A)线段 EF的长不断增大(B)线段 EF的长逐渐减小(C)线段 EF的长不改变(D线段 EF的长不能确定(A)1 (B)1.5 (C)2 (D)3 7如图,在矩形ABCD中,AB=3,AD=4,P 是 AD上不与 A、D 重合的一动点,PE AC,PEBD,E、F为垂足,则PF+PE的值为()文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 H
42、C5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7
43、P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 H
44、C5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7
45、P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 H
46、C5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7
47、P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 H
48、C5N2Z8E8O2 ZY1U6J3K7P6(A)2.4 (B)2 (C)2.5 (D)2.6 8如图,把正方形ABCD 的对角线分成几段,以每一段为对角线作正方形,设这几个小正方形的周长和为p,正方形 ABCD 的周长为 q,则 p与 q的关系是()(A)pq (B)pq (C)p=q (D)p与 q 无关二、填空题9.如图,在平行四边形ABCD中,DB=DC,C=70,AEBD于 E,则 DAE=度。13.如图,在矩形ABCD 中,BD是对角线,ABD=30,将 ABD沿直线 BD折叠,点 A落在E处,则 CDE=。14.如图,在梯形ABCD 中,AD BC,AC BD,AC=8,BD=6
49、,则此梯形的高为。15以长为8,宽为 6 的矩形各边中点为顶点的四边形的周长为,面积为。文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3
50、 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3K7P6文档编码:CX7W5C4M6E3 HC5N2Z8E8O2 ZY1U6J3