Euclid:Proposition/I/33

Proposition

In the words of Euclid:

The straight lines joining equal and parallel straight lines (at the extremities which are) in the same direction (respectively) are themselves equal and parallel.

(The Elements: Book $\text{I}$: Proposition $33$)

Sources

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