Which quadrilateral a rhombus is a rectangle an?

A rhombus is a type of quadrilateral characterized by having all four sides of equal length. While a rectangle has opposite sides that are equal and all interior angles measuring 90 degrees, a rhombus does not require right angles. However, when a rhombus has all angles as right angles, it is also a rectangle, making it a special case known as a square. Thus, while all squares are rhombuses and rectangles, not all rhombuses or rectangles are squares.