The simplest form of polygon is a triangle.
groups of letters that form the building blocks of words.
mlofakueo
polygon form
You can form dear, dare, or read.
gaue
Line segments that form a polygon are called its sides.
They are the straight lines which form the boundaries of a polygon.
Any polygon can be the base of a pyramid and so any polygon can form a polyhedron.
They form a vertex of the polygon.
By Alphabets, Numerics & Special characters...
It's neither. Both the phrases "A-Z alphabet" and "A-Z alphabets" don't make any sense in English.