1) A trapezoid is a quadrilateral with at least one pair of parallel sides, while a rhombus must have two pairs of parallel sides (it is a special case of a parallelogram).

2) The sides of a rhombus are all equal, while a trapezoid may have all 4 sides of a different length.

2) The sides of a rhombus are all equal, while a trapezoid may have all 4 sides of a different length.