Definition:Cone/Apex

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 $PQR$:


 * Cone.png

In the above diagram, the point $A$ is known as the apex of the cone.

Also known as
The apex of a cone is also known as its vertex.

Also see

 * Definition:Base of Cone