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MathNet 2004 — Part 02 Question 124

Math Olympiad Vault · MathNet 2004 — Part 02

Question 124

A floor is tiled with equilateral triangles of side length $1$, as shown. If you drop a needle of length $2$ somewhere on the floor, what is the largest number of triangles it could end up intersecting? (Only count the triangles whose interiors are met by the needle - touching along edges or at corners doesn't qualify.)

Question illustration