Plane Command

Plane( <Polygon> ): Creates a plane through the polygon.
Plane( <Conic> ): Creates a plane through the conic.
Plane( <Point>, <Plane> ): Creates a plane through the given point, parallel to the given plane.
Plane( <Point>, <Line> ): Creates a plane through the given point and line.
Plane( <Line> , <Line> ): Creates the plane through the lines (if the lines are in the same plane).
Plane( <Point>, <Point>, <Point> ): Creates a plane through three points.