Axiom: 1.2: Segment Extension
(Postulate 2 from Book 1 of Euclid's “Elements”)
And to produce a finite straight line continuously in a straight line.
A segment may be extended from any length to a longer segment, a ray, or a straight line.
Adapted from CC BY-SA 3.0 Sources:
- Callahan, Daniel: "Euclid’s 'Elements' Redux" 2014
Adapted from (Public Domain)
- Casey, John: "The First Six Books of the Elements of Euclid"
Adapted from (subject to copyright, with kind permission)
- Fitzpatrick, Richard: Euclid's "Elements of Geometry"