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Cone, Cylinder Edges?

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Does a cone have an edge? Does a cylinder have an edge? a selection of answers from the Dr. Math archives.

Parts of a Cone
Does a solid cone have any edges?

Does a Cone have an Edge? A Vertex?
Our 4th grade math textbook defines a cone as "A solid figure with one circular face and one vertex." This sounds reasonable until you read the textbook's definitions for face, edge, and vertex.

Number of Cylinder Edges
My son was asked "how many edges are there on a solid cylinder?" on a recent math examination. His answer was "2" and it was marked incorrect.

Types of Cones
Does a cone have an edge? Does it depend on what type of cone you have? What are the different types of cones?

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Elementary 3D Geometry
Middle School 3D Geometry
High School 3D Geometry
Index of Selected Answers to Common Questions

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