Can a quadrilateral ABCD be a parallelogram if : `angle D+angleB=180^@`?

Can a quadrilateral ABCD be a parallelogram if : angle A=70^@ and angleC=65^@ ?

Can a quadrilateral ABCD be a parallelogram if :AB=DC=8cm,AD=4cm and BC =4.4cm?

In a quadrilateral ABCD, AO and BO are bisectors of angleA and angle B respectively. Prove that angleAOB=1/2(angleC+angleD)

Diagonals of a quadrilateral ABCD bisect each other. If angleA=35^@ determine angleB .

In quadrilateral ABCD, AP and BP are bisector of angleA and angleB respectively, then find the value of x

Fill ups A quadrilateral is a parallelogram if both pairs of opposite angles is………………. .

Given statement below. Identify the statement given below as contrapositive or converse of each other. If a quadrilateral is a parallelogram, then its diagonals bisect each other. (i) If the diagonals of a quadrilateral do not bisect each other, then the quadrilateral is not a parallelogram. (ii) If the diagonals of a quadrilateral bisect each other, then it is a parallelogram.