4 faces (1 base +3 faces that converge)
4 vertices (3 vertices on the base + one which the 3 faces converge on)
6 edges (3 edges for the base + 3 edges leading to top vertex)
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A square based pyramid has 8 edges, 6 vertices and 5 faces.
A triangular pyramid consists of a triangular base. Attached to each side of the triangular base is a triangular face and these all meet up at the apex of the pyramid. There are, therefore, 6 edges, 4 bases and 4 vertices.
A triangular based pyramid (which is a tetrahedron) has 1 base,4 flatfaces, 6 edges and 4 vertices
Three possibilities that spring to mind are: a diquadrilateral pyramid (two quadrilateral based pyramids with their bases stuck together) or a pentagonal pyramid or a triangular prism.
A square based pyramid has 4 vertices round the base and one where all the sides meet at the top giving a total of 5. A square base pyramid has 5 vertices. Five: there are four at the bottom and one at the top.Four from the square base plus an extra one at the top making 5 in all.There are 5 vertices. 4 on the base, representing the square, and 1 on the top.