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如图,在▱ABCD中,过A、B、C三点的圆交AD于E,且与CD相切.若AB=4,...
如图,在▱ABCD中,过A、B、C三点的圆交AD于E,且与CD相切.若AB=4,BE=5,则DE的长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230612529380396/SYS201310212306125293803008_ST/images0.png)
A.3
B.4
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230612529380396/SYS201310212306125293803008_ST/0.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230612529380396/SYS201310212306125293803008_ST/1.png)
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