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(229) 3

Part of 1989 Tournament Of Towns

Problems(1)

TOT 229 1989 Autumn A J3 equilateral triangles by 3families of // lines

Source:

3/12/2021
The plane is cut up into equilateral triangles by three families of parallel lines. Is it possible to find 44 vertices of these triangles which form a square?
combinatorial geometrycombinatoricsEquilateralequilaterals