A rhombus has four vertices. The point of intersection of two adjacent sides of a rhombus is called the vertex of the rhombus. A rhombus is a quadrilateral with all four sides equal.
A rhombus is a closed-plane figure that is shaped like a diamond. It is a parallelogram, and both pairs of opposite sides are parallel to each other. A rhombus has two diagonals. The diagonals of a rhombus bisect each other at right angles. The area of a rhombus is half the product of its diagonals. The sum of the four angles of the rhombus is always 360 degrees. The perimeter of a rhombus is the sum of all four sides of the rhombus, or four times the length of one side.