Plane Command
 Plane( <Polygon> )

Creates the plane containing the given polygon.
 Plane( <Conic> )

Creates the plane containing the conic.
 Plane( <Point>, <Plane> )

Creates the plane through the given point, parallel to the given plane.
 Plane( <Point>, <Line> )

Creates the plane through the given point and line.
 Plane( <Line> , <Line> )

Creates the plane through the lines (that must be intersecting or parallel to each other).
 Plane( <Point>, <Point>, <Point> )

Creates the plane through the given points.
 Plane( <Point>, <Vector>, <Vector> )

Creates the plane through the given point and having as normal vector the cross product of the given vectors (that must not be collinear).
See also Plane through 3 Points and Plane tools. 