Mathematician Solves 50-Year-Old Möbius Strip Puzzle

A trapezoid was key to discovering the elusive answer to a riddle about Möbius strips. Möbius strips are curious mathematical objects. To construct one of these single-sided surfaces, take a strip of paper, twist it once and then tape the ends together. Making one of these beauties is so simple that even young children can do it, yet the shapes’ properties are complex enough to capture mathematicians’ enduring interest.

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