cut an triangle into 2019 pieces (2020 Novosibirsk Oral Geo Oly 7.3)
Source:
April 27, 2021
geometrycombinatorial geometry
Problem Statement
Cut an arbitrary triangle into pieces so that one of them turns out to be a triangle, one is a quadrilateral, ... one is a -gon and one is a -gon. Polygons do not have to be convex.