13 angles Inca stone discovered at archeological site Inca Wasi in Huancavelica
By Ministerio de Cultura, Peru
October 23, 2014
Researchers of the stretch project Vilcashuaman – Pisco of the Qapaq Ñan from the Ministry of Culture
have discovered a stone of 13 angles (tridecagon) carved in a hydraulic system built at the archeological site Incawasi in Huancavelica.
Like the 12-angle stone (dodecagon) in the wall on Cusco’s Hatun Rumiyoc street, the stone at Inkawasi has been cut to fit in with impressive precision to the other stone blocks in the wall. Read more
Inca Geometry: Tridecagon
A tridecagon is a polygon with 13 sides, angles, and vertices.