问题:
如图,AB∥CD,AC、BD交于O,BO=7,DO=3,AC=25,则AO长为( )
A.10 B.12.5 C.15 D.17.5
如图,AB∥CD,AC、BD交于O,BO=7,DO=3,AC=25,则AO长为( )
A.10 B.12.5 C.15 D.17.5
A.10 B.12.5 C.15 D.17.5
参考答案: