Yes. Each triangular face has three edges, and each edge is shared by two faces. So if there are n faces then there are 3n/2 edges. You can then use Euler's formula to find the number of vertices.
Yes. Each triangular face has three edges, and each edge is shared by two faces. So if there are n faces then there are 3n/2 edges. You can then use Euler's formula to find the number of vertices.