One of the straight lines sweeping out a ruled surface. The rulings on a ruled surface are asymptotic curves.

# Ruling

## See also

Asymptotic Curve, Director Curve, Ruled Surface, Ruled Surface Directrix## Explore with Wolfram|Alpha

## Cite this as:

Weisstein, Eric W. "Ruling." From *MathWorld*--A
Wolfram Web Resource. https://mathworld.wolfram.com/Ruling.html