Understanding Parallelograms, Rhombuses, and Squares

A parallelogram is a quadrilateral with both pairs of opposite sides parallel. The sum of the interior angles of a parallelogram is 360 degrees. The properties of parallelograms include: Opposite sides are congruent (equal in length) and opposite angles are equal. The diagonals of a parallelogram bisect each other (cut each other in half).

What is rhombus ?
A rhombus is a type of quadrilateral with all sides equal in length. It has four sides, four vertices, and four edges. A rhombus is a special kind of parallelogram where both pairs of opposite sides are of equal length.

What is square ?
A square is a special type of rectangle where all four sides have the same length. All interior angles in a square are right angles (90 degrees). The sum of the interior angles of a square is 360 degrees.