The word "parallelogram" comes from the Greek word "parallelogrammon" (bounded by parallel lines). Rectangles, rhombuses, and squares are all parallelograms. In all Parallelogram's opposite angles are equal to each other.

What makes something a parallelogram?

A parallelogram is a quadrilateral in which both pairs of opposite sides are parallel . ... Opposite sides are congruent; Adjacent angles are supplementary; The diagonals bisect each other.

What is always true about a parallelogram?

It is always true that a parallelogram: is a four-sided shape (a quadrilateral) has opposite sides that are parallel to each other and of the same length has … 2) The opposite sides are congruent. ... Opposite angles are congruent.