Which statement describes a rhombus?

Which statement describes a rhombus?

• A. Opposite sides are parallel.
• B. All sides are congruent.
• C. A parallelogram with diagonals perpendicular.
• D. Opposite sides are parallel and all sides are congruent.

Answer: (D)

A rhombus is a four-sided figure where opposite sides are parallel and all four sides are the same length. Saying it is a parallelogram with all sides congruent captures exactly what a rhombus is: the parallelogram shape plus equal side lengths. The other ideas are either true for broader shapes (parallelograms in general) or rely on diagonal properties that aren’t as direct a definition. So this description best identifies a rhombus.

A rhombus is a four-sided figure where opposite sides are parallel and all four sides are the same length. Saying it is a parallelogram with all sides congruent captures exactly what a rhombus is: the parallelogram shape plus equal side lengths. The other ideas are either true for broader shapes (parallelograms in general) or rely on diagonal properties that aren’t as direct a definition. So this description best identifies a rhombus.