From what I know, a vertex (singular of vertices) is a corner. It could be a 3D corner, or a 2D corner, but it's got to be a corner. read more
Quick Answer. A cuboid always has eight vertices. A cuboid is a three-dimensional shape that is similar to a cube in that it has six faces that are all at 90-degree angles to each other, but at least two of the faces on a cuboid are rectangles, not squares. read more
A: A cube has a total of eight vertices, despite having six square faces that would all have four vertices of their own if pulled apart. A cube has six square faces that are joined not only at the sides, but at the vertices, essentially resulting in two squares that are joined by four lines, one at each corner. read more