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17 is a Fermat Prime which means that the 17-sided Regular Polygon (the Heptadecagon) is
Constructible using Compass and Straightedge (as proved by
Gauß 
).
See also Constructible Polygon , Fermat Prime, Heptadecagon
References
Lefevre, V. ``Properties of 17.'' http://www.ens-lyon.fr/~vlefevre/d17_eng.html.
Shell Centre for Mathematical Education. ``Number 17.''
http://acorn.educ.nottingham.ac.uk/ShellCent/Number/Num17.html.