A key corollary to (2) is that

來源: 外-國人 於 2010-07-21 11:28:30 [] [舊帖] [給我悄悄話] 閱讀數 : (149 bytes)
回答: The maximum is n-3 reflex angles 由 AnaZhang 於 2010-07-21 05:29:33

it has at least one convex angle. Then you draw a inward arc at the opening of the angle. Then you can draw unlimited number of chords along the arc.

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