Symmetry in a Regular Pentagon

Consider a 2D shape consisting of a regular pentagon. A regular pentagon is defined as a five-sided polygon where all sides are of equal length and all interior angles are equal. If you were to draw a vertical line down the middle of the pentagon from the top vertex, what would you observe about the two sides of the pentagon?

Which of the following statements accurately describes the properties of this line of symmetry in the context of the pentagon?