Euclid:Proposition/XI/10
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Proposition
In the words of Euclid:
- If two straight lines meeting one another be parallel to two straight lines meeting one another not in the same plane, they will contain equal angles.
(The Elements: Book $\text{XI}$: Proposition $10$)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 3 (2nd ed.) ... (previous) ... (next): Book $\text{XI}$. Propositions