Q:

# How many edges does a cone have?

A:

A cone has one edge. The edge appears at the intersection of of the circular plane surface with the curved surface originating from the cone's vertex.

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This question could be confusing since it depends on how one defines "edge" and "plane." If it is considered that the cone has an infinite amount of intersecting planes, there are an infinite number of edges where each of these planes intersect with each other. If one considers the term "edge" to mean the boundary of a geometric plane figure, then a cone has one edge along the perimeter of its flat base.

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## Related Questions

• A:

A cone is made up of one circular face and a vertex, which is also its pointed side. A right cone is one in which the vertex is directly above (or below) the center of the base.

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• A:

Calculate the surface area of a cone by first finding the area of the slanted section on top and the area of the base. Add these two areas together to get the total surface area of the cone.

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Examples of items that are cone-shaped or conic in design are the waffle cone, paper megaphone, traffic cone, funnel, Christmas tree and party hat. Some decorative items, such as lamp shades, earrings or brooches, are also shaped like coes. The hives of bald-faced hornets display a conic shape.