At what $n$ can a regular $n$-gon be cut by disjoint diagonals into $n- 2$ isosceles (including equilateral) triangles?
Problem
Source: Sharygin 2006 VIII-XI CR 10
Tags: diagonals, regular polygon, cut, isosceles, combinatorial geometry, geometry
Source: Sharygin 2006 VIII-XI CR 10
Tags: diagonals, regular polygon, cut, isosceles, combinatorial geometry, geometry
At what $n$ can a regular $n$-gon be cut by disjoint diagonals into $n- 2$ isosceles (including equilateral) triangles?