Chapter 4 covers parallel, skew, and perpendicular lines and the angles associated with them!
4.1 (parallel lines & transversals)
4.2 (Slopes & equations of lines)
4.3 (parallel & Perpendicular lines)
4.1 (parallel lines & transversals)
4.2 (Slopes & equations of lines)
4.3 (parallel & Perpendicular lines)