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They are both polyhedra with a polygonal base. The difference is that a prism has another, identical polygonal face and this is joined to the base by a number of parallelograms (usually rectangles in high school maths). A pyramid has a single point, called the apex , which is connected to the base by a set of triangular faces.

If the polygonal shape has n sides,

the prism has n+2 faces, 3n edges and 2n vertices

the pyramid has n+1 faces, 2n edges and n+1 vertices.

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12y ago

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