如图,在矩形ABCD中,E为AD中点,AC、BE交于F,连接DF,下列结论错误的是( )
![](https://img.xkw.com/dksih/QBM/2017/12/13/1837635661111296/1841306937516032/STEM/3c1862ec-45cb-4e6f-bec8-080149e45eff.png?resizew=128)
![](https://img.xkw.com/dksih/QBM/2017/12/13/1837635661111296/1841306937516032/STEM/3c1862ec-45cb-4e6f-bec8-080149e45eff.png?resizew=128)
A.CF=2AF | B.BE⊥AC | C.S△ABF = S△ADF | D.S四边形CDEF = 5S△AEF |
17-18九年级上·河北保定·期中 查看更多[2]
更新时间:2017-12-18 21:31:27
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【推荐1】如右图,矩形ABCD的边BC在x轴的负半轴上,顶点D(a,b)在反比例函数
的图像上,直线AC交y轴点E,且S△BCE=4,则k的值为( )
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【推荐2】如图,在矩形ABCD中,∠BAD的平分线交BC于点E,交DC的延长线于点F,取EF的中点G,连接CG,BG,BD,DG,下列结论:
①BE=CD;
②∠DGF=135°;
③∠ABG+∠ADG=180°;
④若
,则
.
![](https://img.xkw.com/dksih/QBM/2022/6/19/3004631019544576/3006864635879424/STEM/35262ef954f14b2db6a5303858af021f.png?resizew=136)
其中正确的结论是( )
①BE=CD;
②∠DGF=135°;
③∠ABG+∠ADG=180°;
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fffdc8ca57aaadd63e0315d5df44922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc6c7b58fd64db794f2565ac7f5888f8.png)
![](https://img.xkw.com/dksih/QBM/2022/6/19/3004631019544576/3006864635879424/STEM/35262ef954f14b2db6a5303858af021f.png?resizew=136)
其中正确的结论是( )
A.①②③ | B.①②④ | C.①③④ | D.②③④ |
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【推荐1】如图,在矩形ABCD中,∠ADC的平分线与AB交于E,点F在DE的延长线上,∠BFE=90°,连接AF、CF,CF与AB交于G,有以下结论:
①AE=BC
②AF=CF
③BF2=FG•FC
④EG•AE=BG•AB
其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/2018/8/9/2006515963248640/2012564833648641/STEM/a90e3f638ea5462ab9b8546a70b61a2f.png?resizew=145)
①AE=BC
②AF=CF
③BF2=FG•FC
④EG•AE=BG•AB
其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/2018/8/9/2006515963248640/2012564833648641/STEM/a90e3f638ea5462ab9b8546a70b61a2f.png?resizew=145)
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【推荐2】如图,在Rt△ABC中,∠ACB=90°,分别以其三边为边向外作正方形,延长EA交BG于点M,连接IM交AB于点N,若M是BG的中点,则
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A.![]() | B.![]() | C.![]() | D.![]() |
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