A cylinder is circular and circular objects do not have edges.

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how many edges does a cylinder have

A cylinder has 2 bases and 1 curved surface, no vertices and technically does not have any edges.

Because a cylinder has a curved surface, it is technically not a polyhedron. The terms "faces" and "edges" only apply to polyhedra which have flat surfaces, straight edges and vertices.

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The number of edges on a cylinder depends on the edge, which is usually defined as a straight line or edge. In this case, a cylinder has no edges, so the answer is zero. You can find more information here: http://mathforum.org/library/drmath/view/54701.html

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