The regular nonagon
Keywords:Normal nonagon, geometric construction, cyclotomy, regular star nonagon
In the present work we study the construction of the regular nonagon, ie the division of the circle into nine equal parts. We prove that the construction with ruler and compass is impossible and we present the two regular star nonagons.
Gountouvas Sotiris, (2017). Geometrical Routes, Athens.
Gountouvas Sotiris, (2019). The Regular Heptagon, EDiMaST, 5, 689-695.
Stamatis Evangelos, (1975). Euclid’s Elements (???????? ?????????), Athens.
Tsimbourakis Demetrios, (1985). Geometry in ancient Greece, Athens.
Fraleigh John, (1989). A first course in Abstract Algebra, Addison-Wesley Publishing Company, NY.
Sir Tomas L. Heath, (2001). A History of Greek Mathematics (translated in Greek), K.E.E?.??, Athens.
How to Cite
Copyright (c) 2020 Sotìris Goudouvàs
This work is licensed under a Creative Commons Attribution 4.0 International License.