William Dunham showed me this elegant symmetric proof of Heron's formula by Bernard Oliver http://johnng.inscyber.net/proof-without-words-heron.pdf …pic.twitter.com/A4BQqzuMN0
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@MathPrinceps @stevenstrogatz I came up with a nice proof of Heron's formula using the Geometric Mean...pic.twitter.com/BXk0tWqCKm
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