Answers

2016-03-16T19:03:52+05:30
2016-03-16T19:16:09+05:30
In sq abcd
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

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