Hi Alejandro - try: Make the ‘theoretical’ triangle.
Put on Mid and End Osnaps
Start the Curve command, degree=3 in the Mid of one of the triangle sides and snap to mids and ends:
Degree 2 will get you a ‘tighter’ fit to the triangle and dergee 5 a looser one
SoftTrianglePts.3dm (33.9 KB)
SoftTriangle.gh (8.4 KB)
-Pascal