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A parallelogram has 2 sets of parallel sides. The opposite sides  are equal in length and opposite angles are equal. Examples of  parallelograms are squares, rectangles and â¦ rhombuses. You can find  the perimeter of a parallelogram by doubling the base+side length. 6 people found this useful.
One special kind of polygons is called a parallelogram. It is a quadrilateral where both pairs of opposite sides are parallel. There are six important properties of parallelograms to know: 1  Opposite sides are congruent (AB = DC). 2  Opposite angels are congruent (D = B). 3  Consecutive angles are supplementary (A + D = 180Â°). 4  If one angle is right, then all angles are right. 5  The diagonals of a parallelogram bisect each other.