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What shapes are the faces on a triangular prism? A triangular prism consists of 3 rectangles and 2 triangles (one on each end). For comparison: a rectangular pyramid (like the Great Pyramids) have 4 triangles and 1 rectanglâ¦e (usually a square). A triangular pyramid has 4 triangles (imagine a normal pyramid, but with only three sides and the bottom is a triangle as well). 6 people found this useful.
Both Triangular prism and a triangular pyramid tetrahedron are polyhedrons. A polyhedron, in geometry is a three-dimensional solid with straight edges and flat faces. Since both prism and pyramid are polyhedrons, most people believe they are the same, while they are not. A pyramid is formed by joining a polygonal base with a point called apex in such a way that each edge of the base forms a triangle.