# Tetrahedron Command

From GeoGebra Manual

- Tetrahedron [ <Point>, <Point>, <Direction> ]
- Creates a tetrahedron having the segment between the two points as an edge.
- The other vertices are univocally determined by the given direction, that needs to be:
- a vector, a segment, a line, a ray
**orthogonal**to the segment, or - a polygon, a plane
**parallel**to the segment.

- a vector, a segment, a line, a ray
- The created tetrahedron will have:
- a face with the segment as an edge in a plane orthogonal to the given vector/segment/line/ray, or
- a face with the segment as an edge in a plane parallel to the polygon/plane.

- Tetrahedron[ <Point>, <Point>, <Point>]
- Creates a tetrahedron with the three points of the first face. The points have to draw an equilateral triangle for the tetrahedron to be defined.

- Tetrahedron[ <Point>, <Point>]
- Creates a tetrahedron with the two points of the first face, and the third point automatically created on a circle, so that the tetrahedron can rotate around its first edge.
**Note:**Tetrahedron[A, B] is a shortcut for Tetrahedron[A, B, C] with C = Point[Circle[Midpoint[A, B], Distance[A, B] sqrt(3) / 2, Segment[A, B]]].

**Note:**See also Cube, Octahedron, Icosahedron, Dodecahedron commands.