architecture- megastructures
- trusses
- modular construction
- geodesic domes
- obelisks
- pyramids
- roofs
- ornamental triskelion
color- Color spaces / masks
- Additive / subtractive
- Digital / traditional
economic- triangular arbitrage
- eye of providence
- class hierarchy
- ponzi scheme
geopolitical- flag of sicily
- flag of nepal
- flag of the isle of man
- triskelion
- dymaxion / fuller map
- icosahedron projection
mathematics- cellular automata
- wolfram's new science
- binary search tree
- graphics programming
- lindenmeyer systems
- context-free
- recursion
- penrose triangle
- (non)euclidean space
- euclid's construction
- delta
music- the triangle
- contrabassbalalaika
origami- stanford rabbit
- tesselation
- ron resch
religion- christianity
- holy trinity
- triskele symbol
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