1.5: Parallel and Perpendicular Lines

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Presentation transcript:

1.5: Parallel and Perpendicular Lines WELCOME 1.5: Parallel and Perpendicular Lines

Chapter 1 Section 5

Perpendicular / Parallel Perpendicular Lines: Lines that intersect to form a right (90°) angle m f “m is Perpendicular to f ” Parallel Lines: Coplanar lines that never intersect p ‖ m “p & m are parallel” p f m m

Parallel Slope In a coordinate plane, two nonvertical lines are parallel if they have the same slope

Perpendicular Slope In a coordinate plane, two nonvertical lines are perpendicular if they have opposite reciprocal slopes (Slopes are opposite & flipped!!)

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