This will be of no use for a beginner modeler. It is for people who are familiar with the more advanced aligning and snapping methods of Blender and are obsessed with making their models mathematically perfect and symmetrical and whatnot. The kit includes a digon, triangle, rectangle, pentagon, hexagon and an octagon. The most common polygons used in low poly modeling. All polygons are two dimensional with no faces. If you find an error or wish to see another polygon in the kit let me know.
The useful part is that there is a vertex in each intersection of edges pictured below. The vertex positions on the intersections are mathematically absolute.
Polygon_Toolkit.blend