Ruled Surface

Ruled Surface

Surface generated by a line or a curve that moves in space according to a pre-established rule.

A surface is a ruled surface if a line or a curve (the generatrix, which lies entirely on the surface, passes through each of its points.

Example

The lateral face (curved surface) of a cone is a ruled surface, as it is formed by a generatrix that passes through the apex of the cone.

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