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A decagonal prism has 20 vertices: 10 at each end.

Q: How many vertices for a decagonal prism?

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20 vertices.

There are 30 edges on a decagonal prism.

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

i think there is 12 faces are in the decagonal prism this is mhel a decagonal prism has 11 faces

30

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

A decagonal prism has 20 vertices: 10 at each end.

20 vertices.

Vertices: 20 Edges: 30 Faces: 12

Edges = 30 Faces = 12 Vertices = 20

12 faces 20 vertices 30 edges

The question cannot be answered because it makes no sense. "Decagonal" is an adjective, not a noun and the answer will depend on whether the question is about a decagonal pyramid, a decagonal prism or decagonal bipyramid, or something else.

There are 30 edges on a decagonal prism.

A decagonal prism has 12 faces

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.