Euclid:Proposition/XIII/17/Porism
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Proposition
In the words of Euclid:
- From this it is manifest that, when the side of the cube is cut in extreme and mean ratio, the greater segment is the side of the dodecahedron.
(The Elements: Book $\text{XIII}$: Proposition $17$ : Porism)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 3 (2nd ed.) ... (previous) ... (next): Book $\text{XIII}$. Propositions