Euclid:Proposition/XIV/1
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Proposition
In the words of Hypsicles of Alexandria:
- The perpendicular drawn from the centre of any circle to the side of the pentagon inscribed in the same circle is half the sum of the side of the hexagon and the decagon inscribed in the same circle.
(The Elements: Book $\text{XIV}$: Proposition $1$)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 3 (2nd ed.) ... (previous) ... (next): The Contents of the So-Called Book $\text{XIV}$. By Hypsicles