Euclid:Proposition/XI/5
Jump to navigation
Jump to search
Proposition
In the words of Euclid:
- If a straight line be set up at right angles to three straight lines which meet one another, at their common point of section, the three straight lines are in one plane.
(The Elements: Book $\text{XI}$: Proposition $5$)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 3 (2nd ed.) ... (previous) ... (next): Book $\text{XI}$. Propositions