Euclid:Proposition/IX/18
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Proposition
In the words of Euclid:
- Given two numbers, to investigate whether it is possible to find a third proportional to them.
(The Elements: Book $\text{IX}$: Proposition $18$)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 2 (2nd ed.) ... (previous) ... (next): Book $\text{IX}$. Propositions