Type:Interactive, Lesson Plan
This resource has been contributed by Winpossible, and can also be accessed on their website by clicking here -
In this mini-lesson, we introduce parallel and perpendicular lines as well as look at the relationship between their slopes. Parallel Lines are distinct lines lying in the same plane; they never intersect each other and have the same slope. Two lines Ax + By + C = 0 and Dx + Ey + F = 0 are parallel if A/D = B/E. For example, 2x + 4y = 5 and 2y + 4x = 6 are parallel lines. Perpendicular lines are lines that intersect at right angles. If two lines are perpendicular to each other, then the product of their slopes is equal to –1 i.e. the slopes are reciprocals of each other with opposite signs. For example, 3x + 4y = 12 and 4x – 3y = 20 are perpendicular lines.
This FREE mini-lesson is a part of Winpossible's online course that covers all topics within Algebra I. Click on the video below to go through it. If you like it, you can buy our online course in Algebra I by clicking here.
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- Mathematics > Algebra
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Keywords:parallel lines perpendicular lines relationship linear line plane slope algebra help intersect equation equal reciprocal example online math practice questions solution quizzes
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