Vertcals are industry specific focus groups that will be useful (a) to align the industry domain specifics and (b) to align with the clients belonging to this industry Horizontals are the specific capabilities or skills (technical and non-technical) that "span across" two or more industry verticals
The answer depends on what you mean by "the verticals of a triangle".
if you mean vertices. 8
Either no verticals or two verticals and two horizontals.
Verticals are corners so in a two dimensional a square has 4 verticals
A tetrahedron need not have any verticals.
3 angles 3 verticals
A circle (in 2-dimensions and a sphere in 3-d. And the word is vertices, not verticals!
The customers in a vertical market come from one specific industry, and use a particular product for different things. In a horizontal market, customers come from various industries, but all use a product for the same purpose.
The hendecahedra has 5 verticals, 8 edges, and 5 faces.
It does not!
Eight.