10000 equal equilaterals
Source: III May Olympiad (Olimpiada de Mayo) 1997 L2 P3
September 17, 2022
combinatoricscombinatorial geometry
Problem Statement
There are equal tiles in the shape of an equilateral triangle. With these little triangles, regular hexagons are formed, without overlaps or gaps. If the regular hexagon that wastes the fewest triangles is formed, how many triangles are left over?