2.4: Parallel Lines - Mathematics LibreTexts
Euclid's Elements Book 1: Proposition 29, Parallel Lines Converse
Book 1, Proposition 29 By: Isabel Block and Alexander Clark - ppt download
Transversal and Angles
Equivalents to Euclid`s Postulate V
What is the converse of the corresponding angles postulate? - Quora
PDF) Proving Unproved Euclidean Propositions on a New Foundational Basis
How to prove the consecutive interior angles theorem - Quora
PPT - MAT 360 Lecture 9 PowerPoint Presentation, free download - ID:1230069
Parallel postulate - Wikipedia
Angles in Triangle Add to 180: history and a collection of proofs