If the prism is based on regular decagons and it is a right prism, all 12 faces.
12 faces 20 vertices 30 edges
A decagonal prism has 12 faces
A decagonal based pyramid will have 11 faces, 11 vertices and 20 edges
By definition, a dodecahedron must have twelve faces. So it must be an decagonal prism. Edges = 30 Faces = 12 Vertices = 20
There are 30 edges on a decagonal prism.
30
If the prism is based on regular decagons and it is a right prism, all 12 faces.
20
it is 19 I am really juhnm kjnbvcx
Vertices: 20 Edges: 30 Faces: 12
12 faces 20 vertices 30 edges
Edges = 30 Faces = 12 Vertices = 20
19 * * * * * Actually it is 30 edges. Ten around each of the decagonal faces, and ten more connecting the corresponding vertices of the two decagons.
A decagonal prism has 12 faces
Assuming a regular decagon is the base of the prism, it would be 10 faces. With an irregular decagon, it is possible that two (or more) of the edges of the decagons are perpendicular, so all 12 faces could have perpendicular edges.
A decagonal based pyramid will have 11 faces, 11 vertices and 20 edges