0 if it is irregular, 8 if it is regular. Probably some numbers in between are possible, too.
A regular pentagon has five axes of symmetry.
it has 5 lines of symmetry
3
i think 5
A regular octagon has 8 lines of symmetry. See the Related Link below that includes a diagram of an octagon with the lines of symmetry drawn. A non-symmetrical octagon may have between 0-4 lines of symmetry.
It has 5 axes of symmetry
A regular octagon has 8 lines of symmetry.
Not sure about a duodecagon, but a regular dodecagon has 12 axes of symmetry.
A regular pentagon has five axes of symmetry.
8
There are eight lines of symmetry.
it has 5 lines of symmetry
12
3
5
8
If it's a regular 8 sided octagon then it rotational symmetry to the order of 8