M and N are mid-point of the diagnols AC and BD respectivley of quadrilateral ABCD, then`bar(AB) + bar(AD)+bar(CB)+bar(CD)`=

If M and N are the mid-points of the diagonals AC and BD respectively of a quadrilateral ABCD,then the of vec AB+vec AD+vec CB+vec CD equals

If ABCD is a square, then bar(AB) + 2 bar(BC) + 3 bar(CD) + 4 bar(DA) =

In a quadrilateral ABCD, bar(AC) bot bar(BD) and AB=AD. ABCD is a ________

ABCD is a parallelogram, P and Q are the mid-points of the sides bar(AB) " and " bar(DC) respectively. Show that bar(DP) " and " bar(BQ) trisect bar(AC) and are trisected by bar(AC) .

If ABCD is a square then, 2bar(AB)+4bar(BC)+5bar(CD)+7bar(DA)=

If D is the mid -point of side AB of DeltaABC , then bar(AB) + bar(BC) + bar(AC) =