如图,在四边形ABCD中,AD∥BC,AB⊥BC,AD=2,BC=6,CD=8,E,F分别是边ABCD的中点, DH⊥BC于点H,连接EH,EC,EF,现有下列结论:①∠CDH=30°;②EF=4;③四边形EFCH是菱形;④S△EFC=3S△BEH.你认为结论正确的有___________ .(填序号)
17-18八年级下·江苏·单元测试 查看更多[8]
苏科版八年级下册 第9章《中心对称图形一平行四边形》单元综合检测北师大版数学九年级上册同步练习: 1.1 菱形的性质与判定江苏省无锡市前洲中学2019-2020学年八年级下学期3月月考数学试题2020年山东省济宁市嘉祥县九年级中考一模数学试题(已下线)【万唯原创】2018年安徽省中考数学-面对面-安徽真题-21~22 四边形—安徽真题广西壮族自治区来宾市2021-2022学年八年级下学期期中数学试题(已下线)第9章 中心对称图形——平行四边形【单元提升卷】-【满分全攻略】2022-2023学年八年级数学下学期核心考点+重难点讲练与测试(苏科版)2024年山东省济宁市兖州区朝阳学校九年级中考二模数学试题
更新时间:2018-04-06 16:01:48
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【知识点】 四边形其他综合问题
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【推荐1】如图,分别以
的斜边
,直角边
为边向外作等边
和等边
,
为
的中点,分别连接
,
,
,
与
相交于点
,著
,下列四个结论:①
;②四边形
为平行四边形;③
;④
.其中结论正确的是__________ (填序号即可).
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【推荐2】如图,四边形
是正方形,点
在
上,
绕点
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