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Heron’s formula | What is the hidden meaning of 1 + 2 + 3 = 1 x 2 x 3

Today’s video is about Heron’s famous formula and Brahmagupta’s and Bretschneider’s extensions of this formula and what these formulas have to do with that curious identity 1+2+3=1x2x3. To see more amazing videos go to Mathologer.

Heron’s Formula