Definition:Cone (Geometry)/Base

From ProofWiki
Jump to navigation Jump to search

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


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


Also see


Comment

Hence the colloquial phrase base over apex as the description of a particularly flamboyant physical tumble.


Sources