Bitcoin is the interior triangle inequality | Euclid's Elements Book 1 Prop 21

First published at 06:05 UTC on March 16th, 2022.

Side argument:

BE < BA + AE
BE + EC < BA + AC
CD < CE + ED
CD + DB < CE + EB
= BE + EC
CD + DB < BA + AC

Angle argument:

CED < BDC
CEB < BAC
CED = CEB
CED < BAC

Element page: https://mathcs.clarku.edu/~djoyce/ja…

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