Can a quadrilateral ABCD be a parallelogram if

**(i)** ∠D + ∠B = 180° ?

**(ii)** AB = DC = 8 cm, AD = 4 cm and BC = 4.4 cm

**(iii)** ∠A = 70° and ∠C = 65°?

**(i)** If in a quadrilateral ABCD, ∠D + ∠B = 180°, then it is not necessary that ABCD is a parallelogram.

**(ii)** Since AD ≠ BC, i.e., the opposite sides are unequal, so ABCD is not a parallelogram.

**(iii)** Since ∠A ≠ ∠C, i.e., the opposite angles are unequal, so ABCD is not a parallelogram.