Euclid's Elements - Book 8, Proposition 20
Channel: Sandy Bultena
Date: 23/06/2022

Proposition:
If A:C = C:B, then 
A and B are similar plane numbers,  
A= ij, B = pq and i:j = p:q

PDFs:
https://github.com/sandy-bultena/Euclid/tree/master/Propositions/PDFs