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Q: How many faces edges and vertices does a decagonal prism?

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Edges = 30 Faces = 12 Vertices = 20

Vertices: 20 Edges: 30 Faces: 12

By definition, a dodecahedron must have twelve faces. So it must be an decagonal prism. Edges = 30 Faces = 12 Vertices = 20

12 faces * * * * * Correct as far as it goes, but incomplete. 20 vertices 30 edges

19 * * * * * Actually it is 30 edges. Ten around each of the decagonal faces, and ten more connecting the corresponding vertices of the two decagons.

EDGES There are 9 edges on a triangular prism. VERTICES There are 6 vertices's on a triangular prism. FACES There are 5 faces on a triangular prism. --------------- An n-gonal prism has 3n edges, 2n vertices and n+2 faces.

20

faces ,edges and vertices of a rectangular prism

There are 30 edges on a decagonal prism.

A pentagonal prism has 7 faces, 10 vertices and 15 edges.

A circular prism, or a cylinder, has 2 edges and no vertices.

It depends on a decagonal what. A decagonal prism has 20 vertices. A decagonal pyramid has 11 vertices.

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