Name of a 3D shape with 8 sides?

Answer 1

An octahedron is a three dimensional object with eight faces.

In a regular octahedron the faces are all triangles.

Answer 2

hexagonal prism

In geometry, the hexagonal prism is a prism with hexagonal base. This polyhedron has 8 faces, 18 edges, and 12 vertices. Since it has 8 faces, it is an octahedron. However, the term octahedron is primarily used to refer to the regular octahedron, which has eight triangular faces.

https://en.wikipedia.org/wiki/Hexagonal_prism#/media/File:Hexagonal_prism.png

Answer 3

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