AA Similarity - Video Lecture

In this video lecture the AA Similarity Theorem is used to justify when two triangles are similar, which then allows for the use of proportions to solve for corresponding sides. Additionally, the Third Angle Theorem, and the Triangle Angle Sum Theorems are invoked to justify and solve for unknown angles. Students are expected to implement the properties of parallel lines and transversals, and are introduced to similar triangles in application problems involving shadows.