2021年苏科版八年级下册《平行四边形》单元测试卷含解析.pdf

苏科版八年级下册平行四边形单元测试卷含解析一、选择题1已知平行四边形ABCD 的周长为32，AB=4，则 BC 的长为()A4 B12 C24 D28 2如图，在平行四边形ABCD 中，B=80，AE 平分 BAD 交 BC 于点 E，CFAE 交AD 于点 F，则 1=()A40 B50 C60 D803顺次连接矩形四边中点得到的四边形一定是()A正方形B矩形 C 菱形 D 平行四边形4如图，平行四边形ABCD 中，AB=3，BC=5，AC 的垂直平分线交AD 于 E，则 CDE的周长是()A6 B8 C9 D10 5下列条件之一能使菱形ABCD 是正方形的为()AC BD BAD=90 AB=BC AC=BD A B C D 6如图，菱形ABCD中，AB=AC，点E、F分别为边AB、BC上的点，且AE=BF，连接CE、AF 交于点 H，连接 DH 交 AG 于点 O 则下列结论 ABF CAE，AHC=120，AH+CH=DH中，正确的是()ABCD精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 1 页，共 23 页7如图，在?ABCD 中，E 是 BC 的中点，且AEC=DCE，则下列结论不正确的是()ASAFD=2SEFBBBF=DF C四边形AECD 是等腰梯形DAEB=ADC 8不能判断四边形ABCD 是平行四边形的是()AAB=CD，AD=BC BAB=CD，ABCD CAB=CD，AD BC D ABCD，AD BC 9如图，周长为16 的菱形 ABCD 中，点 E，F 分别在 AB，AD 边上，AE=1，AF=3，P 为BD 上一动点，则线段EP+FP 的长最短为()A3 B4 C5 D6 10如图，在矩形ABCD 中，BC=6，CD=3，将 BCD 沿对角线BD 翻折，点C 落在点 C1处，BC1交 AD 于点 E，则线段 DE 的长为()A3 BC5 D二、填空题11直角三角形中，两直角边长分别为12 和 5，则斜边中线长是_12如图，一个含有30 角的直角三角形的两个顶点放在一个矩形的对边上，若1=25，则 2=_精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 2 页，共 23 页文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N6文档编码:CD7R10X7F4O1 HA3P1F4Q9C6 ZU6F6G1H1N613如图，菱形ABCD 的两条对角线相交于O，若 AC=6，BD=4，则菱形ABCD 的周长是_14矩形、菱形、正方形都是特殊的四边形，它们具有很多共性，如：_（填一条即可）15?ABCD 的周长是30，AC、BD 相交于点O，OAB 的周长比 OBC 的周长大3，则AB=_ 16如图，正方形ABCD 的对角线长为8，E 为 AB 上一点，若EFAC 于 F，EGBD于 G，则 EF+EG=_ 三、解答题17如图，在菱形ABCD 中，M，N 分别是边AB，BC 的中点，MPAB 交边 CD 于点 P，连接 NM，NP（1）若 B=60，这时点 P 与点 C 重合，则 NMP=_ 度；（2）求证：NM=NP；（3）当 NPC 为等腰三角形时，求B 的度数精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 3 页，共 23 页文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X1018如图，矩形 ABCD 中，点 E，F 分别在 AB，CD 边上，连接 CE、AF，DCE=BAF 试判断四边形AECF 的形状并加以证明19如图，ABC 是等腰三角形，AB=BC，点 D 为 BC 的中点（1）用圆规和没有刻度的直尺作图，并保留作图痕迹：过点 B 作 AC 的平行线BP；过点 D 作 BP 的垂线，分别交AC，BP，BQ 于点 E，F，G（2）在（1）所作的图中，连接BE，CF求证：四边形BFCE 是平行四边形20如图，在菱形ABCD 中，AB=2，DAB=60，点 E 是 AD 边的中点点M 是 AB 边上一动点（不与点A 重合），延长ME 交射线 CD 于点 N，连接 MD、AN（1）求证：四边形AMDN是平行四边形；（2）填空：当 AM 的值为 _时，四边形AMDN 是矩形；当 AM 的值为 _时，四边形AMDN 是菱形21如图，在平行四边形ABCD 中，AE BC 于 E，AFCD 于 F，BD 分别与 AE、AF 相交于 G、H精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 4 页，共 23 页文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10（1）在图中找出与ABE 相似的三角形，并说明理由；（2）若 AG=AH，求证：四边形ABCD 是菱形22如图，矩形ABCD 的对角线相交于点O，DEAC，CE BD求证：四边形OCED 是菱形23（1）如图 1，在正方形ABCD 中，E 是 AB 上一点，F 是 AD 延长线上一点，且 DF=BE 求证：CE=CF；（2）如图 2，在正方形ABCD 中，E 是 AB 上一点，G 是 AD 上一点，如果 GCE=45 ，请你利用（1）的结论证明：GE=BE+GD（3）运用（1）（2）解答中所积累的经验和知识，完成下题：如图 3，在直角梯形ABCD 中，AD BC（BC AD），B=90 ，AB=BC，E 是 AB 上一点，且 DCE=45 ，BE=4，DE=10，求直角梯形ABCD 的面积24如图，在?ABCD 中，E、F 分别为边ABCD 的中点，BD 是对角线，过A 点作平行四边形 AGDB 交 CB 的延长线于点G（1）求证：DEBF；（2）若 G=90，求证：四边形DEBF 是菱形精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 5 页，共 23 页文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10苏科新版八年级数学下册平行四边形2015 年单元测试卷一、选择题1已知平行四边形ABCD 的周长为32，AB=4，则 BC 的长为()A4 B12 C24 D28【考点】平行四边形的性质【分析】根据平行四边形的性质得到AB=CD，AD=BC，根据 2（AB+BC）=32，即可求出答案【解答】解：四边形 ABCD 是平行四边形，AB=CD，AD=BC，平行四边形ABCD 的周长是32，2（AB+BC）=32，BC=12 故选 B【点评】本题主要考查对平行四边形的性质的理解和掌握，能利用平行四边形的性质进行计算是解此题的关键2如图，在平行四边形ABCD 中，B=80，AE 平分 BAD 交 BC 于点 E，CFAE 交AD 于点 F，则 1=()A40 B50 C60 D80【考点】平行四边形的性质【分析】根据平行四边形的对边平行和角平分线的定义，以及平行线的性质求1 的度数即可【解答】解：AD BC，B=80 ，BAD=180 B=100 AE 平分 BAD DAE=BAD=50 AEB=DAE=50 CFAE 1=AEB=50 故选 B【点评】此题主要考查平行四边形的性质和角平分线的定义，属于基础题型3顺次连接矩形四边中点得到的四边形一定是()精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 6 页，共 23 页文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10A正方形B矩形 C 菱形 D 平行四边形【考点】中点四边形【分析】三角形的中位线平行于第三边，且等于第三边的一半需注意新四边形的形状只与对角线有关，不用考虑原四边形的形状【解答】解：如图，连接AC、BD 在ABD 中，AH=HD，AE=EB，EH=BD，同理 FG=BD，HG=AC，EF=AC，又 在矩形 ABCD 中，AC=BD，EH=HG=GF=FE，四边形 EFGH 为菱形故选 C【点评】本题考查了菱形的判定，菱形的判别方法是说明一个四边形为菱形的理论依据，常用三种方法：定义，四边相等，对角线互相垂直平分4如图，平行四边形ABCD 中，AB=3，BC=5，AC 的垂直平分线交AD 于 E，则 CDE的周长是()A6 B8 C9 D10【考点】线段垂直平分线的性质；平行四边形的性质【专题】压轴题；转化思想【分析】根据线段垂直平分线的性质和平行四边形的性质可知，CDE 的周长=CD+DE+CE=CD+DE+AE=CD+AD=AB+BC=3+5=8【解答】解：根据垂直平分线上点到线段两个端点的距离相等知，EC=AE；根据在平行四边形ABCD 中有 BC=AD，AB=CD，CDE 的周长等于CD+DE+CE=CD+DE+AE=CD+AD=AB+BC=3+5=8故选 B【点评】本题结合线段垂直平分线的性质考查了平行四边形的性质，利用中垂线将已知转化是解题的关键精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 7 页，共 23 页文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 HG2J1Y8I1K6 ZH1A8I1A3X10文档编码:CK5M7P1V5N8 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