A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges.
18 base edges and 9 lateral edges
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Edges: 27 Faces: 11 Vertices: 18
A nonagonal prism has eleven faces.
a triangular prism has 5 sides.
9
An heptagonal based prism, also known as a heptagonal prism, has two faces that are perpendicular to each other. These faces are the bases of the prism, which are heptagons in this case. The perpendicular edges are the edges that connect the vertices of the bases at right angles, resulting in a total of 14 perpendicular edges in a heptagonal prism.