Euclid:Proposition/I/39

Proposition

In the words of Euclid:

Equal triangles which are on the same base, and on the same side are also in the same parallels.

(The Elements: Book $\text{I}$: Proposition $39$)

Sources

• 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 1 (2nd ed.) ... (previous) ... (next): Book $\text{I}$. Propositions