IMO 1988 LL VIE91
A regular 14-gon with side length a is inscribed in a circle of
IMO 1988 LL VIE91
Origin: VIE
Problem
A regular 14-gon with side length a is inscribed in a circle of radius one. Prove that 2 −a 2a
3 cos \pi 7 .
A regular 14-gon with side length a is inscribed in a circle of
Origin: VIE
A regular 14-gon with side length a is inscribed in a circle of radius one. Prove that 2 −a 2a
3 cos \pi 7 .