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

Algebra ->  Parallelograms -> 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      Log On


   

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) About Me  (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.