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Re: 11-gon
Posted:
Oct 24, 1994 5:35 PM
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I'm working my way back through all this email. I see that
"undecagon" and "duodecagon" have been rearing their ugly
heads again. The full set is
monogon, digon, trigon, tetragon, pentagon, hexagon, heptagon, octagon
(of which monogon and digon can only be used in rather special circumstances;
it's digon not "bigon"; and trigon and tetragon are alternatives to "triangle"
and "quadrilateral" - the adjectival forms "trigonal" and "tetragonal"
being more common), then
enneagon, decagon, hendecagon, dodecagon, triskaidecagon, tetrakaidecagon,...
not
nonagon undecagon duodecagon
but tridecagon and tetradecagon (&c)
are OK.
The (synonymous) words "triskaidecaphobia" and "tridecaphobia"
appear in dictionaries (occasionally spelled with a "k" instead
of that "c"). I was reminded of them in O'Hare airport yesterday,
as I passed gates 10,11,12,14,15,... !
John Conway
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