With an Introduction to Slope, we will explore how we can use slope to identify Parallel and Perpendicular Lines. By learning the Application of Theorems Involving Perpendicular Lines you establish a critical mathematical process that transcends across all subjects and areas of specialization Whether you are interested in the Determining the Slope of a Line from a Graph or ready to challenge yourself with Alternate Interior Exterior and Vertical Angles, this Geometry course provides proficiency at all levels of expertise.