Definition:Cone (Geometry)/Base

Definition

Consider a cone consisting of the set of all straight lines joining the boundary of a plane figure $PQR$ to a point $A$ not in the same plane of $PQR$:

The plane figure $PQR$ is called the base of the cone.

Also see

• Definition:Apex of Cone

• Definition:Base of Solid Figure

• Results about bases of cones can be found here.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): cone
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): cone