" 1.Given a parallelogram "ABCD,If|AB|=a,|AD|=b&|AC|=c," then "vec DB,vec AB" has the value "

Given a parallelogram ABCD. If |vec AB|=a,|vec AD|=b&|vec AC|=c, then vec DB*vec AB has the value

Given a parallelogram ABCD . If |vec(AB)|=a, |vec(AD)| = b & |vec(AC)| = c , then vec(DB) . vec(AB) has the value

Given a parallelogram ABCD . If |vec(AB)|=a, |vec(AD)| = b & |vec(AC)| = c , then vec(DB) . vec(AB) has the value

In a parallelogram ABCD. Prove that vec(AC)+ vec (BD) = 2 vec(BC)

In the parallelogram ABCD,vec AC^(2)-vec BD^(2)=

A parallelogram ABCD. Prove that vec(AC)+ vec (BD) = 2 vec(BC) '

If vec a and vec b represent two adjacent sides vec AB and vec BC respectively of a parallelogram ABCD, then show that its diagonals vec AC and vec DB are equal to vec a+vec b and vec a-vec b respectively.

ABCD is a parallelogram . If vec(AB)=vec(a), vec(BC)=vec(b) , then what vec(BD) equal to ?

ABCD is a parallelogram, with AC, BD as diagonals. Then vec AC - vec BD =