12 faces 20 vertices 30 edges
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.
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.