# Definition:Right Circular Cone/Generatrix

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## Definition

Let $K$ be a right circular cone.

Let $A$ be the apex of $K$.

Let $B$ be the base of $K$.

Then a line joining the apex of $K$ to its directrix is a **generatrix of $K$**.

## Also known as

A **generatrix** of a surface can also be referred to as a **generator** or **generator element**.