ABC is an equilateral triangle of side ‘a'. Then `bar(AB).bar(BC) +bar(BC).bar(CA)+ bar(CA).bar(AB) =`

ABC is an equitateral triangle of side 'a'. Then bar(AB).bar(BC)+bar(BC).bar(CA)+bar(CA).bar(AB) =

In a right angled triangle ABC, hypotenuse AB=P then bar(AB).bar(AC)+bar(BC).bar(BA)+bar(CA).bar(CB) = ………

If, in a right angled triangle ABC, the hypo tenus AB =p, then bar(AB).bar(AC)+bar(BC).bar(BA)+bar(CA).bar(CB) =

ABCDE is a pentagon then bar(AB)+bar(AE)+bar(BC)+bar(DC)+bar(ED)+bar(AC)=

In DeltaABC, " if " BC = a, CA = b and AB = C, " then what is the value of " bar(AB).bar(AC)+bar(BC).bar(BA)+bar(CA).bar(CB) ?

ABCDE is a regular hexagon. i) If bar(AB) + bar(AE)+ bar(BC) + bar(DC) + bar(ED) + bar(AC)=lambdabar(AC) then lambda=

ABCDE is a pentagon. If the sum of the vectors bar(AB),bar(AE), bar(BC), bar(DC), bar(ED), bar(AC) is lambda bar(AC) then find the value of lambda .

If A,B, C and D are four points, then show that |bar(AB) xx bar(CD) + bar(BC) xx bar(AD) + bar(CA) xx bar(BD)| is four times the area of Delta ABC

If ABCD is a parallelogram such that bar(AB)=bar(a), bar(BC)=bar(b)" then "bar(AC), bar(BD) are