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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.
A parallelogram has 2 pairs of parallel sides. End of story. It can be proved that opposite sides are equal length and diagonals bisect, but thatâs another story. A rhombus is a special case of a parallelogram with all sides being equal. It can be proved the diagonals intersect at right angles. But itâs not part of the definition. Squares and rectangles are rhombi and parallelograms, respectively.