How are parallelogram and a rhombus different?

Answer 1

All four sides of a rhombus are the same length. In a parallelogram there are two pairs of sides with equal lengths but one pair is different from the other pair.

Answer 2

All four sides in a rhombus must be of the same length. In a parallelogram, the pair of opposite sides must be of the same length, but each pair can be different from the other.

Answer 3

All sides of a rhombus must be the same. That is not required of a parallelogram.