Definition:Euclid's Definitions - Book XI/4 - Plane at Right Angles to Plane
Jump to navigation
Jump to search
Definition
In the words of Euclid:
- A plane is at right angles to a plane when the straight lines drawn, in one of the planes, at right angles to the common section of the planes are at right angles to the remaining plane.
(The Elements: Book $\text{XI}$: Definition $4$)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 3 (2nd ed.) ... (previous) ... (next): Book $\text{XI}$. Definitions