Definition:Euclid's Definitions - Book V/6 - Proportion

Definition

In the words of Euclid:

Let magnitudes which have the same ratio be called proportional.

(The Elements: Book $\text{V}$: Definition $6$)

Sources

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