2 triangles and 3 rectangles
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All the faces of a triangular prism must be flat. So finding them should not be too difficult!
a triangular prism have 5-faces,9-edges and 6-vertices
triangular prism
Not necessarily.
One difference: An octahedron has 8 faces, a triangular prism has 5. An octahedron (="eight faces") is a regular high-symmetry solid with all the faces identical. A triangular prism has a triangular base, a triangular roof, and 3 rectangular sides (walls).