How many vertices does a rhombus have?

Hint:In plane Euclidean geometry, a rhombus (plural rhombi or rhombuses) is a quadrilateral whose four sides all have the same length.

Complete step by step answer:

A rhombus is a flat shape with $4$ equal straight sides. Opposite sides are parallel, and the opposite angles are equal.
Number of edges: $4$
Number of vertices: $4$
Line of symmetry: $2$

Note: A rhombus is a quadrilateral (plane figure, closed shape, four sides) with four equal-length sides and opposite sides parallel to each other. All rhombuses are parallelograms, but not all parallelograms are rhombuses. All squares are rhombuses, but not all rhombuses are squares. The opposite interior angles of rhombuses are congruent. Diagonals of a rhombus always bisect each other at right angles.
The opposite sides of your quadrilateral will be parallel, and opposite angles will be the same.