An octagonal based pyramid has 16 edges and 9 vertices.
Nonahedron
An Elongated Square Pyramid
An octagonal pyramid.
nonagon
Faces = 9 Vertices = 9 Edges = 16
16 edges, 9 vertices.
Faces=9 Vertices: 9 Edges=16
Octagonal pyramid: 9 faces 16 edges 9 vertices.
An octagonal pyramid has 9 faces, 9 vertices, 16 edges.
a triangular prism
pentagon
A triangular prism.