Kona became Gon. Angle. Occurs in Hexagon, Septagon, Octogon ( known to the Math World as the Star of Ashta Lakshmi )

Thri, Tri, Kona, Gon, Mithi, Metry = Trikonamithi = Trignometry

Geo = 360 /72 = Jya. Geometry from Jyamithi