To Create a Triangular Surface Using Three Curves
1. Click
Restyle >
Polynomial Surface >
Triangular.
2. Select three curves to create a triangular surface such that these curves form a closed boundary as follows:
◦ Holding down the CTRL key, select two curves in the first direction of the surface. The intersection of the two curves is the pole of the triangular surface.
◦ Select a curve in the second direction of the surface.
A surface bounded by these three curves is created.