27.5.1  Planes in space

The plane command draws and returns a plane. It can take its arguments in three different ways.

1. Three points.
   • plane takes three arguments: P,Q,R, three points.
   • plane(P,Q,R) returns and draws the plane through P,Q and R.
2. A point and a line.
   • plane takes two arguments:
     • P, a point.
     • L, a line.
   • plane(P,L) returns and draws the plane through P and L.
3. An equation.
   • plane takes eqn, the equation of a plane.
   • plane(eqn) returns and draws the plane with the given equation.

Example

or:

or: