We know that the rhombus has four equal sides. The opposite sides of a rhombus are parallel. A rhombus has equal opposite angles. The Diagonals of a rhombus bisect each other at right angles. The Diagonals bisect the angles of a rhombus. The sum of two adjacent angles of a rhombus is equal to a straight angle. The two diagonals of a rhombus form four right-angled congruent triangles.