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regular n-gon be cut by disjoint diagonals into (n-2) isosceles triangles

Source: Sharygin 2006 VIII-XI CR 10

August 23, 2019
diagonalsregular polygoncutisoscelescombinatorial geometrygeometry

Problem Statement

At what nn can a regular nn-gon be cut by disjoint diagonals into nāˆ’2n- 2 isosceles (including equilateral) triangles?
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