It depends on a decagonal what. A decagonal prism has 20 vertices. A decagonal pyramid has 11 vertices.
It depends on a decagonal what. There will be different answers for a decagonal pyramid, prism, dipyramid, etc.
It has 20 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.
A decagonal based pyramid will have 11 faces, 11 vertices and 20 edges
By "corners", do you mean vertices or edges?
11 faces and 11 corners (vertices).
20 edges, 11 vertices (corners) and 11 faces.
It depends on a decagonal what. A decagonal prism has 20 vertices. A decagonal pyramid has 11 vertices.
Decahedron. * * * * * Or a hendecagonal pyramid or a decagonal prism or a cuboid with six corners chopped off or many other possibilities.
It depends on a decagonal what. There will be different answers for a decagonal pyramid, prism, dipyramid, etc.
It has 20 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.
20 faces and 10 sides
A decagonal based pyramid will have 11 faces, 11 vertices and 20 edges
A pyramid has.
No. 11 sides.