Definition:Hyperbola/Asymptote

Parts of Hyperbola

 * HyperbolaParts.png

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

The asymptotes of $K$ are the two straight lines which cross at the center of $K$ such that the distance between $K$ and those lines approaches zero as they tend to infinity.

Also see

 * Hyperbola has two Asymptotes