Definition:Euclid's Definitions - Book XI/11 - Solid Angle
Jump to navigation
Jump to search
Definition
In the words of Euclid:
- A solid angle is the inclination constituted by more than two lines which meet one another and are not in the same surface, towards all the lines.
Otherwise: A solid angle is that which is contained by more than two plane angles which are not in the same plane and are constructed to one point.
(The Elements: Book $\text{XI}$: Definition $11$)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 3 (2nd ed.) ... (previous) ... (next): Book $\text{XI}$. Definitions