Euclid:Proposition/I/9
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Proposition
In the words of Euclid:
- To bisect a given rectilineal angle.
(The Elements: Book $\text{I}$: Proposition $9$)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 1 (2nd ed.) ... (previous) ... (next): Book $\text{I}$. Propositions