Eight sides
No, a cylinder is not a polygon. It is not a polygon because it has curved sides. In order to be considered a polygon, it would need to have flat sides. Also, a polygon is a 2 dimensional shape but a cylinder is a three dimensional shape.
A triangle (not traingle) is a polygon. It can be a regular polygon but need not be.
No, in order to construct a polygon, you need at least three line segments.
It is an equilateral polygon. It is not a regular polygon. For the polygon to be regular, it is not enough for the sides to be congruent: all the angles need to be congruent as well.
yes
No. A polygon can be symmetric but need not be. In fact, the majority of polygons are not symmetrical.
A non polygon is a shape that doesn't meet the requierments to be a polygon. In order to be a polygon, a shape must have no curved lines and must be a closed shape.
A non polygon is a shape that doesn't meet the requierments to be a polygon. In order to be a polygon, a shape must have no curved lines and must be a closed shape.
There's no such thing as a two-sided polygon. In order for a shape to be a polygon, it has to have at least three sides.
It can be but need not be.
It can but need not.
A polygon need not have any axes of symmetry. It can have at most n axes where n is the number of sides that the polygon has.