1 . 如图,AC是矩形ABCD的对角线,AB=2,BC=2
,点E,F分别是线段AB,AD上的点,连接CE,CF.当∠BCE=∠ACF,且CE=CF时,AE+AF=( ).
![](https://img.xkw.com/dksih/QBM/2016/10/10/1574245922750464/1574245928976384/STEM/de1a4929336b4437a801d8a6869973d3.png)
![](https://img.xkw.com/dksih/QBM/2016/10/10/1574245922750464/1574245928976384/STEM/b46bc3906b894f8c9356bdf105ef46d7.png)
![](https://img.xkw.com/dksih/QBM/2016/10/10/1574245922750464/1574245928976384/STEM/de1a4929336b4437a801d8a6869973d3.png)
A.2 | B.![]() | C.![]() | D.![]() |
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2 . 如图,在四边形ABCD中,AD∥BC,∠C=90°,BC=CD=8,过点B作EB⊥AB,交CD于点E,若DE=6,则AD的长为( )
![](https://img.xkw.com/dksih/QBM/2015/9/28/1573917667516416/1573917673209856/STEM/67412453cee4479eb570adafc1a3be44.png)
![](https://img.xkw.com/dksih/QBM/2015/9/28/1573917667516416/1573917673209856/STEM/67412453cee4479eb570adafc1a3be44.png)
A.6 | B.8 | C.10 | D.无法确定 |
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