Definition:Cone/Double Napped Cone

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Definition

A double napped cone is a cone where the lines joining the apex to the circumference of the base extend indefinitely in either dimension:

Nappe

Each of the halves of a double napped cone is a nappe.

Also known as

A double napped cone is also known as a double cone.

Some sources hyphenate: double-napped cone.

Also see

Definition:Bicone

Sources

Weisstein, Eric W. "Double Cone." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/DoubleCone.html

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