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

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

In the Parallelogram ABCD, bar(AC)^(2)-bar(BD)^(2) =

In parallelogram ABCD, its diagonals overline (AC) and overline (BD) intersect at O. if AO=5cm then AC= ……… cm .

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

In trapezium ABCD, overline (AB)|\|overline (DC) . If /_D=x^@ , then /_A= ………….

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

If overline(a) and overline(b) are parallel vectors [[overline(a), overline(b), overline(c)]] =