3 times the number of sides on each base. 3*10 = 30 edges.
There are 30 edges on a decagonal prism.
30
20
It has 11. There are the 10 sides (decagonal) and then the base. So 11 total.
it is 19 I am really juhnm kjnbvcx
Vertices: 20 Edges: 30 Faces: 12
Edges = 30 Faces = 12 Vertices = 20
12 faces 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.
If the prism is based on regular decagons and it is a right prism, all 12 faces.
A decagonal prism has 12 faces
A decagonal prism has 12 faces, 30 edges, and 22 vertices. The two decagonal bases contribute 10 vertices each, while the lateral faces (10 rectangles) connect the corresponding vertices of the bases. Thus, the total number of vertices is 10 (top) + 10 (bottom) = 20, and with the 10 edges of the decagons and 10 vertical edges connecting them, you get 30 edges.