It has 2 bases and 12 faces
There are 30 edges on a decagonal prism.
A decagonal prism has 20 vertices: 10 at each end.
19 * * * * * Actually it is 30 edges. Ten around each of the decagonal faces, and ten more connecting the corresponding vertices of the two decagons.
30
A decagonal prism has 12 faces
12
A decagonal prism has 12 faces.
20
It has 2 bases and 12 faces
If the prism is based on regular decagons and it is a right prism, all 12 faces.
12 faces 20 vertices 30 edges
Edges = 30 Faces = 12 Vertices = 20
An decagonal prism.
There are 30 edges on a decagonal prism.
Vertices: 20 Edges: 30 Faces: 12
There is no such word as "deconagnol". If you meant decagonal, then the answer is 12 faces. If you did not mean decagonal then please resubmit using corrected spelling.