I have no idea about an octogan. An octagon can have none, one, two, up to 8 lines of symmetry.
Four * * * * * If the question refers to an octagon, rather than an octogan, it can have 8 lines of symmetry although it need not have any.
A regular octogan has 8 lines of symetry, and a irregular octogan has 2 lines of symetry.
A nephroid has 2 lines of symmetry.
it has five lines of symmetry
2 lines OF SYMMETRY
10 lines of symmetry
4 Lines of symmetry
2 lines of symmetry
2 lines of symmetry
It has 2 lines of symmetry.
no lines of symmetry