Euclid:Proposition/XIII/8
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Proposition
In the words of Euclid:
- If in an equilateral and equiangular pentagon straight lines subtend two internal angles taken in order, they cut one another in extreme and mean ratio, and their greater segments are equal to the side of the pentagon.
(The Elements: Book $\text{XIII}$: Proposition $8$)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 3 (2nd ed.) ... (previous) ... (next): Book $\text{XIII}$. Propositions