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Parts of Hyperbola



Consider a hyperbola $K$ whose foci are $F_1$ and $F_2$.

Each of the points where $K$ intersects the major axis of $K$ is known as a vertex of $K$.

In the above diagram, $V_1$ and $V_2$ are the vertices of $K$.

Also see

Linguistic Note

The plural of vertex is vertices.

The word vertex is Latin for peak, from which the irregular plural form.