Parallelograms in space: parallelogram

### 14.8.4 Parallelograms in space: parallelogram

See Section 13.9.4 for parallelograms in the plane.

The parallelogram command creates parallelograms in space.

- parallelogram takes three mandatory arguments and one optional argument:
  - A,B,C, three points.
  - var, a variable name.
- parallelogram(A,B,C ⟨,var⟩) returns and draws the parallelogram ABCD determined by A,B and C.
  If the option var is given, the point D will be assigned to it.

#### Examples

- Input

  A:= point(0,0,0);
  B:= point(3,3,3);
  C:= point(0,0,3)
  parallelogram(A,B,C)

  Output:
- Input:

  parallelogram(A,B,C,D)
  coordinates(D)

  Output:

  ⎡ ⎣ | −3,−3,0 | ⎤ ⎦