Properties Of Rhombus For Maths Lesson : Quadrilaterals Done By : Areb 9-N , Gems Our Own Indian School Properties of a Rhombus are as follows : 1) Opposite sides that are equal are parallel. 2) Diagonals bisect each other. 3) Both pairs of opposite angles are equal, 4) Consecutive angles are supplementary. 5) All sides are equal. 6) Diagonals are perpendicular.