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IMO 1969 - Longlist Problems Question 46

IMO Shortlist · IMO 1969 - Longlist Problems

Question 46

(NET 1) The vertices of an $(n+1)$-gon are placed on the edges of a regular $n$-gon so that the perimeter of the $n$-gon is divided into equal parts. How does one choose these $n+1$ points in order to obtain the $(n+1)$-gon with
(a) maximal area;
(b) minimal area?