Final answer:
The most special kind of parallelogram is the square. It is the only parallelogram that can be classified as both a rectangle and a rhombus.
Step-by-step explanation:
The most special kind of parallelogram is the square. A square is a parallelogram that has four congruent sides and four right angles. It is the only parallelogram that can be classified as both a rectangle and a rhombus.
For example, consider a square with sides of length 4 units. Since all sides are congruent, all sides would have a length of 4 units. Additionally, since all angles are right angles, each angle would measure 90 degrees.
A square has unique properties that set it apart from other parallelograms, making it the most special kind.