Is a rhombus always a square?

Answer 1

A Rhombus is a 'lazy' square.

The two pairs of opposite sides of a rhombus are parallel and of equal length, just like a square.

However, The two opposite angles of a rhombus are equal in size, but NOT 90 degrees, One opposite pair are acute angles and the other opposite pair are obtuse angles.

Answer 2

A square is always a rhombus, but a rhombus is a square only when the angles are 90 degrees.