A square is a quadrilateral with all sides equal in length and all interior angles right angles. Thus a rhombus is not a square unless the angles are all right angles. A square however is a rhombus since all four of its sides are of the same length.
you can find the answer to this by looking at the properties of both shapes. a rhombus has Opposite sides that are parallel, Adjacent angles are supplementary, All the four sides are equal, and all 4 sides bisect forming right angles. a square also has these properties therefore a square can classify as a rhombus. but be careful, just because a square is a rhombus, it doesn't always necessary mean that a rhombus is always a square
