It is a sphere, a cylinder and a cone that have less than 3 vertices!
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polyhedron
A sphere...
sides are the face of a 3d shape and verticies are the corner of the shape
3d shapes with plane faces are called polyhedra (singular = polyhedron). The minimum number of vertices is 4, there is no maximum.
Yes, the Platonic solids (excluding the sphere which does not have vertices).