IMO 1969 LL NET46

The vertices of an (n + 1)-gon are placed on the edges of a

IMO 1969 LL NET46

Origin: NET

Problem

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?