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⊙O的两条弦AB与CD相交于点P,PA=3cm,PB=4cm,PC=2cm,则C...
⊙O的两条弦AB与CD相交于点P,PA=3cm,PB=4cm,PC=2cm,则CD=( )
A.12cm
B.6cm
C.8cm
D.7cm
考点分析:
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