Triangular prism
a rectangular based pyramid has got 6 edges and four faces and four vertices.
Pentagonal (not pentaginal). 7 faces 15 edges 10 vertices
12 faces * * * * * Correct as far as it goes, but incomplete. 20 vertices 30 edges
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An octahedron has8 faces, 12 to 18 edges and 6 to 12 edges.
A cuboid has 8 vertices, 12 edges and 6 faces
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.
Triangular prism.
A tetrahedron has 4 vertices's, 6 edges, and 4 faces. Each face is a triangle.It looks like a triangle based pyramid.
A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges.
Heptagonal prism * * * * * No, a heptagonal prism has 9 faces. The correct answer is a hexagonal pyramid.