It can certainly have 0, 1, 2 or 6 lines of symmetry.
An octagon is a 2-dimensional figure, not a line of symmetry. However, it has several lines of symmetry.
2 lines of symmetry
It has 2 lines of symmetry
rectangle
Equilateral Triangles (3 lines of symmetry)Rectangles (at least 2 lines of symmetry)Squares (4 lines of symmetry)Rhombuses (at least 2 lines of symmetry)Any regular polygon (at least 5 lines of symmetry)
It can certainly have 0, 1, 2 or 6 lines of symmetry.
that isn't possible
An octagon is a 2-dimensional figure, not a line of symmetry. However, it has several lines of symmetry.
2 lines of symmetry
It has 2 lines of symmetry
If it is irregular most likely not. I know it is possible to have 2 lines of symmetry but I'm not so sure about 3 lines. Maybe you can figure it out by drawing it for yourself.
rectangle
First of all, your grammar is terrible. The question should be "Does a triangle have 2 lines of symmetry and 2 lines of rotational symmetry? and the answer is no. A triangle can not have 2 lines of rotational symmetry, because you only rotate the image, you do not use any lines.
2 lines OF SYMMETRY
2 lines of symmetry
2 lines of symmetry