If you mean a pyramid with a four sided base, it is a square pyramid. If you mean one with four faces, it is a tetrahedron.
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A pentagonal pyramid.
a four sided pyramid distributes the weight more, so that would be it
A pyramid is usually a 4 sided figure but a cuboid is not. Also, the 4 sided pyramid all the faces are triangle but the cuboid has 2 square faces and 4 rectangle faces
4-sided pyramid.
well actually it is a prism. If you mean a 5 sided pyramid with the 6 side being the bottom it would be called a Pentagonal Pyramid