A rhombus is a parallelogram with three additional properties. In this topic, you explored how the diagonals of a rhombus intersect one another at a right angle and how diagonals bisect the opposite angles. You also studied the characteristics of the sides of a rhombus. Using these properties and those of parallelograms you were able to determine if a parallelogram was a rhombus, as well as find missing side lengths or angle measures.