Before revision: 3-angle spirangle or triangle spiral 4-angle spirangle or rectangle spiral 7-angle spirangle or heptagon spiral 70-angle spirangle In geometry, a spirangle is a spiral polygonal chain.
After revision: Ulam spiral in a3-angle spirangle or triangle spiral 4-angle spirangle or rectangle spiral 7-angle spirangle or heptagon spiral 70-angle spirangle In geometry, a spirangle is a spiral polygonal chain.