- Transformation-RotationTransformations - Rotation1.2.1 Introduction to RotationTransformations - ReflectionVertical AnglesAlternate AnglesAngles in a Right AngleDilated ImagesIntroduction of DilationDilationExterior Angle Sum TheoremExterior Angle Sum TheoremTriangle Exterior AnglesPerpendicular LinesTriangle Exterior AnglesParallel LinesTransversals and Parallel LinesRectangular Prism