SOLUTION: quadrilateral ABCD is a parallelogram. If adjacent angles are congruent, which statement must be true. I know that the answer is Quadrilateral ABCD is a rectangle but I need to kno

Question 582688: quadrilateral ABCD is a parallelogram. If adjacent angles are congruent, which statement must be true. I know that the answer is Quadrilateral ABCD is a rectangle but I need to know why it is a rectangle and not a square. Thank you in advanced for your help I really need it.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
The opposite sides of a parallelogram are congruent.
Opposite angles are also congruent.
Hence it is a rectangle

In a square all sides are congruent.
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