Chapter 3's Top 5 Concepts

Definitions

• Skew Lines - lines that do not intersect and are not on the same plane
• Transversal - a line that intersects two or more lines
• Parallel Planes - planes that never intersect

Formulas

• Parallel Lines - equal slopes
• Perpendicular Lines - negative reciprocal slopes
• example : y = 2x + 14 and y = 2x + 3. Since the slopes are equal (( 2x )), the lines are parallel.
• example : y = 2x + 14 and y = -1/2x + 3. Since the slopes are negative reciprocals (( 2x and -1/2x)), the lines are perpendicular.