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1、沪科版八年级数学下第19 章四边形单元测试卷含答案一、选择题(本大题共5 小题,每小题 5 分,共 25 分;在每小题列出的四个选项中,只有一项符合题意)1若菱形的周长为48 cm,则其边长是()A24 cm B12 cm C8 cm D4 cm 2如图 3G1,在矩形 ABCD 中,对角线 AC,BD 相交于点O,ACB30,则AOB 的大小为()图 3G1 A30B60C90D1203.如图 3G 2所示,在菱形ABCD 中,不一定成立的是()|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页,共 10 页图 3G2 A四边形ABCD 是
2、平行四边形BAC BD C ABD 是等边三角形D CAB CAD 4如图 3G3,在矩形 ABCD 中,O 是对角线AC,BD 的交点,点 E,F 分别是 OD,OC 的中点如果AC 10,BC 8,那么 EF 的长为()A6 B5 C 4 D3 图 3G3 5如图 3G4,菱形 ABCD 的周长为16,ABC120,则 AC 的长为()|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页,共 10 页文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 Z
3、F7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档
4、编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K
5、8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5
6、 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2
7、文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L
8、4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9
9、P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2图 3G4 A4 3 B4 C2 3 D2 二、填空题(本大题共5 小题,每小题 5 分,共 25 分)6在菱形 ABCD 中,若对角线AC8 cm,BD6 cm,则边长 AB_ cm.7矩形两对角线的夹角为120,矩形的宽为3,则矩形的面积为_8如图 3G5 所示,矩形 ABCD 的对角线AC 和 BD 相交于点O,过点 O 的直线分别交 AD,BC 于点 E,F,AB2,BC3,则图中阴影部分的面积
10、为_图 3G5 9已知菱形ABCD 的面积为24 cm2,若对角线AC6 cm,则这个菱形的边长为_cm.10 如图 3G6,在 ABC 中,点 D 是 BC 的中点,点 E,F 分别在线段AD 及其延长线上,且 DEDF.给出下列条件:BEEC;BFCE;ABAC.从中选择一个条件使四边形BECF 是菱形,你认为这个条件是_(只填写序号)|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页,共 10 页文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 Z
11、F7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档
12、编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K
13、8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5
14、 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2
15、文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L
16、4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9
17、P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2图 3G6 三、解答题(本大题共5 小题,共 50 分)11(6 分)如图 3G7 所示,已知四边形ABCD 是菱形,对角线 AC 与 BD 相交于点O,AB 5,AO 4,求 BD 的长图 3G7 12(8 分)如图 3G8,在 ABC 中,ABAC 5,BC 6,AD 是 BC 边上的中线,四边形 ADBE 是平行四边形(1)求证:四边形ADBE 是矩形;(2)求矩形 ADBE 的面积|精.|品.|
18、可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页,共 10 页文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编
19、码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8
20、 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5
21、ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文
22、档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4
23、K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P
24、5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2图 3G8 13.(12 分)如图 3G9,在 ABC 和 EDC 中,AC CECBCD,ACB DCE90,AB 与 CE 交于点 F,ED 与 AB,BC
25、分别交于M,H.(1)求证:CF CH;(2)如图,ABC 不动,将 EDC 绕点 C 旋转到 BCE45时,试判断四边形ACDM是什么四边形?并证明你的结论|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 5 页,共 10 页文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F
26、2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3
27、L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I
28、9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L
29、8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6
30、R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E
31、4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H
32、3L8F2图 3G9 14(12 分)如图 3G10,在四边形ABCD 中,对角线 AC,BD 相交于点O,AOCO,BODO,且 ABC ADC 180.(1)求证:四边形ABCD 是矩形(2)若 ADF FDC32,DFAC,则 BDF 的度数是多少?|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 6 页,共 10 页文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7
33、U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码
34、:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8
35、HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 Z
36、F7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档
37、编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K
38、8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5
39、 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2图 3G10 15(12 分)如图 3G11,?ABCD 的对角线AC,BD 相交于点O,BD12 cm,AC 6 cm,点 E 在线段 BO 上从点 B 以 1 cm/s的速度运动,点 F 在线段 OD 上从点 O 以 2 cm/s的速度运动(1)若点 E,F 同时运动,设运动时间为t 秒,当 t 为何值时,四边形 AECF 是平行四边形?(2)在(1)的条件下,当 AB 为何值时,四边形 AECF 是菱形?四边形AECF 可以是矩形吗?为什么?图 3G11|精.|品.|可.|编.|辑
40、.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 7 页,共 10 页文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6
41、R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E
42、4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H
43、3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6
44、L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y
45、4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U1
46、0H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F21B2B3C解析 灵活掌握菱形的性质定理即可判断4D解析 四边形ABCD 是矩形,AB CD,ABC 90.AC 10,BC8,由勾股定理得AB 102 826,CDAB 6.
47、点 E,F 分别是 OD,OC 的中点,EF12CD3.故选 D.5A解析 设 AC 与 BD 交于点 E,则 ABE 60.根据菱形的周长求出AB 16 44.在 Rt ABE 中,求出 BE2,根据勾股定理求出AE 42222 3,故可得 AC2AE4 3.65解析 如图,在菱形ABCD 中,对角线 AC 8 cm,BD6 cm,AO 12AC4 cm,BO12BD3 cm.菱形的对角线互相垂直,在 RtAOB 中,AB AO2BO242325(cm)|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 8 页,共 10 页文档编码:CH6L6R3
48、L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I
49、9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L
50、8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6R3L4K8 HA9Y4E4I9P5 ZF7U10H3L8F2文档编码:CH6L6