A rhombus can be described as having which specific properties?

In geometry, a rhombus is a specific type of polygon that is a quadrilateral (four-sided figure) characterized by having all sides congruent, which means that all sides are of equal length. Additionally, a rhombus possesses all the properties of a parallelogram. This includes having opposite sides that are parallel and equal in length, and opposite angles that are equal as well. The diagonals of a rhombus also bisect each other at right angles, but congruency of the diagonals is not a defining characteristic of a rhombus, unlike in a rectangle or square.

By recognizing that a rhombus encompasses all the properties inherent to parallelograms, along with the unique property of equal-length sides, we see why this choice reflects an accurate description of a rhombus. In contrast, the other options focus on various properties that do not capture the essence of a rhombus or include additional conditions that do not universally apply to all rhombuses.