BdMO National Junior 2008/9
Posted: Sun Feb 24, 2019 10:06 am
In the convex quadrlateral $ABCD$,points $M,N$ lie on side $AB$ such that $AM=MN=NB$ and points $P,Q$ lie on $CD$ such that $CP=PQ=QD$.Prove that $AMPC=\dfrac 13 $Area of $ABCD$.