The maximum number of lines of symmetry possible in a polygon is equal to ___.
its number of sides
For a regular polygon, the number of lines of symmetry equals the number of sides it has, whereas for an irregular polygon, the number of lines of symmetry is less than the number of sides.
A regular pentagon has 5 lines of symmetry, whereas an irregular pentagon has number of lines of symmetry less than the number of its sides.
Thus, the maximum number of lines of symmetry possible in a polygon is equal to its number of sides.