A pyramid is a generic mathematical term which is used to describe a 3-dimensional shape which consists of an n-sided polygonal base and n triangular faces meeting at an apex.
If the pyramid has an n-sided polygon as base, then it has 2n edges and n+1 vertices (and n+1 faces).
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16 edges, 9 vertices.
square pyramid has 5 faces, 5 vertices and 8 edges
Octagonal pyramid: 9 faces 16 edges 9 vertices.
A pyramid with an n-sided base will have n + 1 vertices, n + 1 faces, and 2n edges. 8 edges, 5 vertices
A pentagonal pyramid has 6 faces, 6 vertices and 10 edges.