A rhombus is a quadrilateral (a four-sided polygon) in which all four sides have the same length. It is also known as an equilateral quadrilateral

. Key properties of a rhombus include:

• Opposite sides are parallel, making it a special type of parallelogram

• Opposite angles are equal, and any two adjacent angles add up to 180°

• Its diagonals are perpendicular to each other (intersect at right angles) and bisect each other as well as the angles they pass through

• A rhombus has two lines of symmetry along its diagonals

• The sum of all interior angles is always 360°

• A rhombus is a tangential quadrilateral, meaning it has an inscribed circle tangent to all four sides

A square is a special case of a rhombus where all interior angles are right angles (90°)

. Thus, every square is a rhombus, but not every rhombus is a square. In summary, a rhombus can be described as a diamond-shaped figure with four equal sides, opposite parallel sides, perpendicular diagonals, and symmetrical properties