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Heron's Formula - What Is the Hidden Meaning of 1 + 2 + 3 = 1 x 2 x 3?
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- 1 Intro
- 2 1+2+3=1x2x3 in action
- 3 Equilateral triangle
- 4 Golden triangle
- 5 Chapter 1: Heron
- 6 Heron's formula
- 7 Brahmagupta's formula
- 8 Bretschneider's formula
- 9 Chapter 2: How? The proof
- 10 Heron via trig
- 11 Cut-the-knot
- 12 Albrecht Hess
- 13 Heron to Brahmagupta proof animation
- 14 Thank you!
- 15 "Maybe one of you can check in the comments" is the new "left as an exercise to the reader" :)
