Euclid:Proposition/VI/12

Proposition

In the words of Euclid:

To three given straight lines to find a fourth proportional.

(The Elements: Book $\text{VI}$: Proposition $12$)

Sources

• 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 2 (2nd ed.) ... (previous) ... (next): Book $\text{VI}$. Propositions