It's possible for any polygon with an even number of sides to have 2 pairs of congruent and parallel sides.
Every parallelogram, including all rhombera, rectangles, and squares, must have.
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A square.
A trapezoid does not has 2 pairs of parallel lines. A parallelogram does.
It is a rectangle.
A parallelogram has 2 pairs of parallel lines
It can be :- 1- a parallelogram 2- Square if diagonals are perpendicular and congruent 3- Rectangle if diagonals are congruent 4- Rhombus if diagonals are perpendicular