email@example.com (Dan Bennett (for William Blackwell)) writes:
>I'm asking this question for William Blackwell, who has yet to get >connected but hopes to do so soon: > >A finite straight line has two sides and can be considered a regular >n-gon where n = 2. (This line is also a rectangle with length, but 0 >width, an ellipse with one axis = 0, an isosceles triangle with base >= 0, and so on. In every case it has two sides.) Is there a correct >"gon" >term (besides" line segment") for this shape? A bigon? duogon? digon?
Circa 1968, Nick Katz told his algebra class "let bigons be bigons", and I'm sure that wasn't original with him.