It has 4 sides
It has 2 diagonals
It has 4 interior angles that add up to 360 degrees
It has 4 exterior angles that add up to 360 degrees
It has opposite parallel sides
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Parallelogram quadrilateral trapezoid rectangle square
A shape must have 4 sides in order to be a parallelogram (minus other defining characteristics a shape must have to be a parallelogram).
A parallelogram always has four sides.
a rectangle has 4 right angles, a parallelogram has 2 acute angles and 2 obtuse angles
No because a pentagon has 5 sides whereas a parallelogram has only 4 sides.