four sided triangular ones have 5 sides, (if you include the bottom) 8 edges, and 5 vertices. pure triangular ones have 4 sides, (including the bottom) 6 edges, and 4 vertices.
There are 4 visible faces, 5 vertices, and 8 edges. But considering you can see the bottom of the pyramid, there would then be 5 visible faces, 5 vertices, and 8 edges. * * * * *That is an incomplete...