There are four sides. Their names will depend on the orientation of the square.
The sides of an angle are never segments....they are segments only if the sides are joined at some extent.
A square has two sets of parallel line segments. "Parallel" does not describe a square, however.
They could be the four sides of a square.
Congruent Segments (sides) : Segments that are of the same lengths.
All polygon sides are segments of lines.
A circle is not a polygon, because a circle has no sides that are straight line segments.
A closed plane figure bounded by four line segments, or sides, with opposite pairs of sides parallel and equal in length is called a parallelogram. This includes the rhombus, rectangle and square. A polygon with 4 sides and four angles is a quadrilateral; This also includes the square. Polygon, quadrilateral and parallelogram all can be a square.
There are more than two: A parallelogram has two sets of parallel line segments which may be of unequal length; A rectangle is a parallelogram that has line segments that meet at right angles; A rhombus has to sets of parallel line segments which are all of the same length; A square is a rhombus which has line segments meeting at right angles, or stated differently a square is a rectangle which has all line segments of the same length.
sides
It forms a parallelogram.
That seems to be true. Sides pretty much are line segments, and the angles are the end points.