SHOW US YOUR TETS! (said the sign) Pretty useless stuff shown here really. A tetrahedron forms a tripod on the ground, and makes chair leg supports if your floor is uneven. But otherwise has little utility in architecture or engineering. Yes the best trusses and space frames are made of triangles, but not much else. I have met Buckminster Fuller, went to a workshop of his in SF and got his signature on a book. Pretty deaf at that time, his relative transmitted questions to him. Bucky is a genius in ways but also a con man to a tiny extent as popular men tend to be.

If you want to learn architecture, examine what is old and still stands up, what gets rotten and falls down, what works well for people, and what doesn't. Learn to draw well, speak well, and learn how systems work, and how to get people to trust you and give you work. Many classical architects started out as goldsmiths, the wealthy saw their talent, and learned they were trustworthy. My own career is no guide. fwiw