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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.
1 Rhombus: A parallelogram with four congruent sides. 2  Rectangle: A parallelogram with four right angles. 3  Square: A parallelogram with four congruent sides and four right angles. 4  Trapezoid: A quadrilateral with only one pair of parallel sides. Rectangle: A parallelogram with four right angles. 2  Square: A parallelogram with four congruent sides and four right angles. 3  Trapezoid: A quadrilateral with only one pair of parallel sides.