Planes in space: plane

### 14.6.1 Planes in space: plane

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

- plane can take three arguments:
  P,Q,R, three points.
- plane(P,Q,R) returns and draws the plane through P,Q and R.

- plane can take two arguments:
  - P, a point.
  - L, a line.
- plane(P,L) returns and draws the plane through P and L.

- plane can take one argument:
  eqn, the equation of a plane.
- plane(eqn) returns and draws the plane with the given equation.

Example.
Input:

plane(point(0,0,5),point(0,5,0),point(0,0,5))

or:

plane(point(0,0,5),line(point(0,5,0),point(0,0,5)))

or:

plane(x + y + z = 5)

Output: