Those are some interesting links Tom. I'll have to spend some time on those...
Never heard/considered Native American Geometry.
Makes me wonder if there were a preferred number of tepee poles!
According to "The Indian Tipi" by Reginald and Gladys Laubin, Tipis were based on either a 3 pole Tripod or a 4 pole Quadripod depending on the tribe. The Sioux Tipi was based on a tripod with a total of 18 poles. The Shoshoni Tipi was a four pole based tipi with 15 or 18 poles total. Blackfoot and Crow tipis were 4 pole type.
