A cylinder
it has no lines of symetry
It has no lines of symetry at all.
2 lines of Symetry
A regular octogan has 8 lines of symetry, and a irregular octogan has 2 lines of symetry.
That can depend on the font you use to write them, but I guess the number 8 is in 2 planes of symetry and 3 is in one plane of symetry.
One type of symetry is rotation symetry.
A cylinder
it has no lines of symetry
circle
a rhombus has no lines of symetry
It has no lines of symetry at all.
2 lines of Symetry
A regular octogan has 8 lines of symetry, and a irregular octogan has 2 lines of symetry.
If it is a right circular cone, it has an infinite number of planes of symmetry. If it is an oblique circular cone, it has one plane of symmetry.
The given description fits that of a cylinder
A line has two fold rotational symetry.