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## Answers

first consider triangle adb

ao=bo therefore ao can be considered median

=>ar(ado)=ar(abo)

similarly in triangle abc

ao=co , bo median

=>ar(abo)=ar(cbo)

likewise in tr dcb

do=bo oc median

=>ar(boc)=ar(cod)

ar(aod)=ar(aob)=ar(cob)=ar(cod)

=> ar(aob>=1/4ar (abcd)

therefore their ratio is 1:4