Lines of Symmetry in a Geometric Shape

Look at the figure below, which represents a geometric shape composed of two identical triangles attached at their bases.

This shape has the following characteristics: it has points A, B, C, D, E, and F, where points A and B are the vertices of the top triangle, points C and D are the endpoints of the base of the triangles, and points E and F are the vertices of the bottom triangle.

If you were to draw a line vertically down the middle of this shape, which can be identified as the line of symmetry, how many lines of symmetry does the entire shape possess?