Equilateral triangles
An octahedron. See related link.
octagonal prism
An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. An octahedron can have 6 to 12 vertices, and 12 to 18 edges.
Not sure there is such a shape. In order to satisfy the Euler characteristics, the shape must have 8 faces and so is an octahedron. But there seems to be no octahedron with 9 vertices.
It has 14 Faces, 24 Edges, and 12 Vertices
It has 8 faces, 6 Vertices, and 12 edges * * * * * That is one configuration. An octahedron can also be a heptagonal pyramid which has 8 faces, 8 vertices and 14 edges.
An octahedron has eight faces. If it has 62 faces then it is not an octahedron!
It has 14 Faces, 24 Edges, and 12 Vertices
An octahedron has8 faces, 12 to 18 edges and 6 to 12 edges.
A cube and a regular octahedron have the same number of edges, vertices, and faces. Both have 12 edges, 8 vertices, and 6 faces.
The prefix octa- means eight. So, a octahedron will have 8 faces. It also has 12 edges and 6 vertices.
An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. An octahedron has 8 faces (as the name implies). It can have 6 to 12 vertices and 12 to 18 edges.
Equilateral triangles
8 faces, 6 vertices and 12 edges
An ordinary octahedron with 8 triangular faces has 6 vertices.
It depends on the exact shape. An octahedron is a shape with eight faces. It can be a heptagonal pyramid (8 vertices, 14 edges), or a hexagonal prism (12 vertices, 18 edges), square dipyramid (6 vertices, 12 edges) are some examples. There are more.