Proof: By Euclid
(related to Lemma: Lem. 10.13: Finding Pythagorean Magnitudes)
![fig013ae](https://github.com/bookofproofs/bookofproofs.github.io/blob/main/_sources/_assets/images/euclid/Book10/fig013ae.png?raw=true)
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References
Adapted from (subject to copyright, with kind permission)
- Fitzpatrick, Richard: Euclid's "Elements of Geometry"