Lesson 1: What Lies Behind "Same Shape"? (Video)
Lesson 2: Properties of Dilations (Video)
Lesson 3: Examples of Dilations (Video)
Lesson 6: Dilations on the Coordinate Plane (Video)
Lesson 8: Similarity (Video)
Lesson 9: Basic Properties of Similarity (Video)
Lesson 10: Informal Proof of Angle-Angle Criterion (Video)
Lesson 11: More About Similar Triangles (Video)
Lesson 12: Modeling with Similarity (Video)