Prism:
A right prism is a prism in which the joining edges and faces are perpendicular to the face bases. This applies if the joining faces are rectangular.If the joining faces and edges are not perpendicular to the base faces, it is called an oblique prism.
Pyramid:
A pyramid is any three dimensional polyhedron where the faces other than the base are triangular and converge on one point, called the apex.The base of the pyramid can be any polygon;it is typically a square or a triangle, leading to three or more non-base faces.

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