pentagonal prism
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pentagonal prism
A pentagonal prism has 7 faces, and 10 vertices, and 15 edges
Well, honey, I hate to break it to you, but that solid you're talking about is a triangular prism. It's got 17 faces, 15 edges, and 10 vertices. So, there you have it - a triangular prism strutting its stuff with all those faces, edges, and vertices.
A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges. 15 edges
pentadecahedron * * * * * No. Even though I do not know the correct answer, I do know that that is not the correct answer. A pentadecahedron has 15 faces - NOT 15 edges. Polyhedra often have names with Greek prefices which refer to the number of faces.