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perpendicular  STEM Dictionary · Parabola · Parallel · Perimeter · Perpendicular · Pi · Plane · Point · Point-Slope Form · Polynomial Perpendicular Lines Theorem If two lines intersect to form a linear pair of congruent angles, then the lines are perpendicular line Proof:

What are parallel lines? What are perpendicular lines? Review examples and explanations to understand parallel and perpendicular lines  Revision notes on Parallel & Perpendicular Lines for the Edexcel IGCSE Maths syllabus, written by the Maths experts at Save My Exams

Two lines are perpendicular if and only if the product of their slopes is -1 If the slopes of two lines which are perpendicular are m1 What are Perpendicular Lines? · Perpendicular lines are two straight lines that meet or intersect at 90° · The opposite of perpendicular lines