It depends on what type of polygon.
A 15 sided polygon has 15 lines of symmetry;) Thanks for asking:)
How many lines of symmetry does the 15 side polygon have
10 lines. Regular polygon of "x" sides has "x" Lines of Symmetry
It has 32 lines of symmetry.
A regular Undegon (11 sided polygon) has 11 lines of symmetry. It also has an order of rotation symmetry of 11.
A polygon need not have any lines of symmetry. The maximum number of lines of symmetry is attained if the polygon is regular; and this is the number of sides (or vertices) of the polygon. If a regular polygon has an even number of sides, then the lines of symmetry are those joining opposite vertices, and those joining the mid-points of opposite sides. If the polygon has an odd number of sides/vertices, the lines of symmetry are those joining each vertex to the mid-point of the opposite side.
A regular 24 sided polygon has 24 lines of symmetry.
20
36
It will have 22 lines of symmetry
24
14