Definition:Cone/Base
< Definition:Cone(Redirected from Definition:Base of Cone)
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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
Comment
Hence the colloquial phrase base over apex as the description of a particularly flamboyant physical tumble.