Either no verticals or two verticals and two horizontals.
Verticals are corners so in a two dimensional a square has 4 verticals
3 angles 3 verticals
A tetrahedron need not have any verticals.
An octahedron has 8 sides.
An octahedron has 18 corners.
a octahedron has 8 faces
An octahedron has eight faces - by definition.
In geometry, an octahedron is a polyhedron with eightfaces.
An octahedron has eight bases/faces.
An octahedron has 8 sides.An octahedron is a polyhedron with eight plane faces.
An octahedron has eight faces. If it has 62 faces then it is not an octahedron!