如图,在平行四边形ABCD中,AD=2AB,F是AD的中点,作CE⊥AB,垂足E在线段AB上,连接EF、CF,则下列结论:①
;②EF=CF;③
;④∠DFE=4∠AEF.其中一定成立的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/38140104-da68-4264-a8ea-47970103c28f.png?resizew=303)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5107e1da3751e42fa013c495ec361f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933b73b42742e0fc30e43a6257ac81ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/38140104-da68-4264-a8ea-47970103c28f.png?resizew=303)
A.①②③④ | B.①②③ | C.①② | D.①②④ |
17-18八年级下·江苏扬州·期中 查看更多[15]
【全国校级联考】江苏省扬州市江都区邵凡片2017-2018学年八年级下学期期中考试数学试题(已下线)2017-2018学年下学期期末复习备考之精准复习模拟题八年级数学(B卷)(北师大版)(已下线)2017-2018学年下学期期末复习备考之精准复习模拟题八年级数学(C卷)(北师大版)江苏省南京玄武外国语学校 、十三中科利华集团校2019-2020学年八年级下学期期中数学试题江苏省东台市第四教育联盟2019-2020学年八年级下学期期中数学试题广西来宾市兴宾区2019-2020学年八年级下学期期中数学试题(已下线)【新东方】初中数学996【2020年】【初二下】(已下线)18.1.1 平行四边形的性质-2020-2021学年八年级数学下册十分钟同步课堂专练(人教版)(已下线)6.1 平行四边形的性质-2020-2021学年八年级数学下册十分钟同步课堂专练(北师大版)江苏省宿迁市沭阳县2021-2022学年八年级下学期期中数学试题江苏省宿迁市沭阳县2021-2022学年八年级下学期期中数学试题(已下线)18.1.1 平行四边形的性质(练习)-2022-2023学年八年级数学下册同步精品课堂(人教版)(已下线)9.3 平行四边形(第1课时)(练习)-2022-2023学年八年级数学下册同步精品课堂(苏科版)(已下线)第十八章《平行四边形》同步单元基础与培优高分必刷卷-2022-2023学年八年级数学下册《考点·题型·技巧》精讲与精练高分突破系列(人教版)(已下线)22.2.1 平行四边形的性质-2022-2023学年八年级数学下册《考点·题型·技巧》精讲与精练高分突破系列(沪教版)
更新时间:2022-08-13 06:50:57
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【推荐1】如图,E在线段
的延长线上,
,连
交
于G,
的余角比
大
,K为线段
上一点,连
,使
,在
内部有射线
,
平分
.则下列结论:①
;②
平分
;③
;④
.其中正确结论的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ff8c8d239cc12ddc3a899e9f054aa9.png)
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【推荐2】如图,分别以
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;②四边形
为平行四边形;③
,其中正确的有( )
![](https://img.xkw.com/dksih/QBM/2022/6/29/3011925139374080/3049985933451264/STEM/32a8f734821f4ec39f717248975a04b6.png?resizew=175)
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【推荐1】如图,▱ABCD中,对角线AC、BD相交于点O,AE平分∠BAD,分别交BC、BD于点E、P,连接OE,∠ADC=60°,BC=2AB=4,则下列结论:①AD=4OE;②BD=2
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