Ditching the Fifth Axiom - Numberphile
Euclid's puzzling parallel postulate - Jeff Dekofsky
A Problem with the Parallel Postulate - Numberphile
Proof of the so-called 5th Postulate.
Fifth Axiom (extra footage) - Numberphile
Euclid's Fifth Postulate
Euclid's Postulates or claims? - PART 3, 4 and 5
Euclid's 5th postulate, The True Interpretation. (world first. please read description)
What is Euclid's fifth postulate and parallel lines?
Axiom 5 Angle Construction Axiom 0.027
There are no axioms or postulates. The 4th Requirement: The Right Angle.
Euclid's elements: definitions, postulates, and axioms
Proof of the Equivalence of Euclid's 5th Postulate and Playfair's Axiom
The 5 Postulates of Euclidean Geometry
The Beautiful Story of Non-Euclidean Geometry
The History of Non-Euclidean Geometry - Sacred Geometry - Part 1 - Extra History
Euclid Parallel Postulate
Euclid's Postulate 5 The Non Euclidean Connection
What Are Axioms?
Prove of converse of Euclid V
Euclid's fifth postulate
Euclid's 5th Axiom and Playfair's Axiom
Parallel Postulate
A Solution to Euclid's Parallel Postulate
