Given a parallelogram ABCD. Complete each statement along with the definition with the definiton or property used.

**(i)** AD = ………

**(ii)** ∠DCB = …………….

**(iii)** OC = ……………….

**(iv)** m∠DAB + m∠CDA = ……………

**(i)** AD = BC : In a parallelogram, opposite sides are euqal.

**(ii)** ∠DCB = ∠DAB : In a parallelogram, opposite angles are equal.

**(iii)** OC = OA : The diagonals of a parallelogram bisect each other.

**(iv)** m∠DAB + m∠CDA = 180° : In a parallelogram, the stun of any two adjacent angles is 180°.