2

Part of 1999 Nordic

Problems(1)

maximal number of 120^o angles in specific 7-gons

Source: Nordic Mathematical Contest 1999 #2

7

-gons inscribed in a circle such that all sides of the

7

-gon are of different length. Determine the maximal number of

120^\circ

angles in this kind of a

7

maximumpolygonanglegeometry