Do Triangles Have Four Sides? #shorts

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In this short, we say hello to the “Sherman line” — a feature of all triangles that made B.F. Sherman say, “what else was there to call [it] but the fourth side of the triangle?”

Check out this interactive version @amazinglybland on twitter made!
https://t.co/lMTauaQP0d?amp=1

Sherman’s original paper:
https://www.jstor.org/stable/2690519