Eight is the lucky number of angles when a line crosses two parallel lines. Scholars watch a concise video in the Socratica Geometry series to learn about angles made by parallel lines and a transversal. Using corresponding and vertical angles helps show that four of the eight angles are congruent.
- Have the class create graphic organizers summarizing angle relationships
- Pupils must have knowledge of vertical angles
- Note that the video does not mention alternate interior or alternate exterior angles
- Animations are simplistic but helpful
- Very slow-paced video