Angle Relationships - Non-Parallel Lines w/ Transversal – GeoGebra

Angles on Parallel Lines – GeoGebra

Angles Formed by Parallel Lines and a Transversal – GeoGebra

Parallel Lines Relationships – GeoGebra

Parallel Lines & Transversal: Using GeoGebra to Actively Explore Angle Relationships

Exploring Parallel Lines Cut By A Transversal – GeoGebra

Parallel Lines, Transversals, and Angles: What's the connection?

Teaching Parallel Line Proofs: Student-Paced – Designated Deriver

Level 1 - Theorems About Lines and Angles - Congruence, Proof, and Constructions (Geometry)

Transversal Through Non-Parallel Lines – GeoGebra

Alternate Interior Angles by Parallel Lines and a transversal