tetrahedron unfold
In this tetrahedron model, you may vary:
- its base (ABC) and the position of its altitude (D) (on the left);
- the apex (E) (on the right).
You may put the point D at specific centres of the base by using the command 'TriangleCenter' in the input bar.
For example, you enter 'D=TriangleCenter(A,B,C,1)', D will be the incenter of triangle ABC.
Similarly, 2 for centroid, 3 for circumcenter and 4 for orthocenter.