publication date: Wednesday, June 20, 2018 (part of Summer 2018)

category: Philosophy

clue: It's not as popular as E = mc², but this ancient philospher's calculation that a² + b² = c² continues to be a cornerstone of children's first geometry classes.

difficulty: very easy

solved by: Russ Wilhelm, Samir Mehta, Chris Lemler, Richard Slominsky, and Matthew Preston


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