Pyramid with a hexagonal base
most likely a triangular prism
Octohedron
A hexagonal pyramid
If the triangles are congruent then it is a triangular-based prism.
A 3D shape with one base and three faces can only have triangular faces.
Pyramid with a hexagonal base
most likely a triangular prism
Octohedron
a pyramid
There are 2 triangle base faces, and 3 rectangle faces. 5 total faces.
A hexagonal pyramid
Triangular Prism
This is an impossible shape. The only 3-d shape with 4 plane faces is a tetrahedron (triangular pyramid). While its base is a triangle, all of its other faces are also triangles and so cannot have parallel sides.
A triangle with an approximately spherical shape on top, is one possibility.
If the triangles are congruent then it is a triangular-based prism.
A triangle has three faces. In geometry, a face refers to a flat surface of a solid shape. Since a triangle is a two-dimensional shape with three sides, it has three faces. Each side of the triangle forms one of its three faces.