Proving Parallel Lines Using Angle Theorems and Geometry Proofs

The Organic Chemistry Tutor

This educational video provides a comprehensive tutorial on geometry concepts focused on proving that lines are parallel. The instructor uses digital handwriting on a blackboard style background to visually demonstrate theorems involving transversals, including Alternate Interior Angles, Alternate Exterior Angles, Corresponding Angles, and Same-Side Interior Angles. The video clearly distinguishes between the forward theorems (if lines are parallel, then angles are congruent) and their converses (if angles are congruent, then lines are parallel), which is the focus of this lesson.