a hexagon has one face and 6 edges a hexagonal pyramid has 7 faces a hexagonal prism has 8 faces
A triangular prism has 5 faces, including one parallel pair; any of the faces might be considered a "base" depending on its orientation.
Pentagonal (not pentaginal). 7 faces 15 edges 10 vertices
You add up all the sides and you should get 5!
A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges.
A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges.
12 faces * * * * * Correct as far as it goes, but incomplete. 20 vertices 30 edges
A skewed prism or, if the other faces are rectangles rather than parallelograms, a right prism.
Triangular prism.
An octagon doesn't have any faces: faces only apply to 3-dimensional objects. If you meant edges, or sides, an octagon has eight. If you meant an octagonal prism, they have ten faces.
Triangular prism
A trianglular prism is made up of triangles and rectangles, so its net must have the same shapes.