The difference between a parallelogram and a rhombus is that a parallelogram is a quadrilateral whose opposite sides are parallel to one another regardless of how many sides the figure has, and a rhombus is a parallelogram that has four sides with two opposites sides that are equal to one another. When all sides of the parallelogram are equal but have angles that are not equal to 90 degrees, it is also called a rhombus.
Continue ReadingEvery rhombus is a parallelogram, but not every parallelogram is a rhombus. A rhombus that has straight sides and 90-degree angles is simply called a square.
Learn more about Geometry