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如图,⊙O的直径是10cm,PA,PB切⊙O于点A、B两点,若PO=13cm,则...
如图,⊙O的直径是10cm,PA,PB切⊙O于点A、B两点,若PO=13cm,则△PAB的周长为
cm.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164757970539178/SYS201310221647579705391009_ST/images0.png)
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