如图所示,菱形ABCD中,AB=5,∠ABC=60°,∠EAF=60°,∠EAF的两边分别交BC、CD于E、F
(1)如图1所示,当点E、F分别在边BC、CD上时,求CE+CF的值;
(2)如图2所示,当点E、F分别在CB、DC的延长线时,CE、CF又存在怎样的关系,并证明你的结论.
(1)如图1所示,当点E、F分别在边BC、CD上时,求CE+CF的值;
(2)如图2所示,当点E、F分别在CB、DC的延长线时,CE、CF又存在怎样的关系,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2019/6/2/2216936462090240/2217872630611968/STEM/833118b336004c4ba37ad5e2f95038ba.png?resizew=341)
更新时间:2019-06-03 22:16:19
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适中
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【推荐1】如图,在
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解答题-证明题
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【推荐2】如图,已知A、B、C是圆O上的三点,AB=AC,M、N分别是AB、AC的中点,E、F分别是OM、ON上的点.
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