Euclid:Proposition/IX/2

Proposition

In the words of Euclid:

If two numbers by multiplying one another make a square, they are similar plane numbers.

(The Elements: Book $\text{IX}$: Proposition $2$)

Sources

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