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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.
Definition: A parallelogram is a quadrilateral with both pairs of opposite sides parallel. *Parallelogram I have: - 2 sets of parallel sides - 2 sets of congruent sides-opposite angles congruent-consecutive angles supplementary-diagonals bisect each other-diagonals form 2 congruent triangles.Using this definition, the remaining properties regarding a parallelogram can be proven true and become theorems.Parallelogram I have: - 2 sets of parallel sides - 2 sets of congruent sides-opposite angles congruent-consecutive angles supplementary-diagonals bisect each other-diagonals form 2 congruent triangles.