Definition:Euclid's Definitions - Book I/8 - Plane Angle
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Definition
In the words of Euclid:
- A plane angle is the inclination to one another of two lines in a plane which meet one another and do not lie in a straight line.
(The Elements: Book $\text{I}$: Definition $8$)
Sources
- 1926: Sir Thomas L. Heath: Euclid: The Thirteen Books of The Elements: Volume 1 (2nd ed.) ... (previous) ... (next): Book $\text{I}$. Definitions