Apply slopes and not slipping. Learners discover the relationship between slopes of parallel and perpendicular lines. Individuals use that information to find equations of lines through a given point that is either parallel or perpendicular to given line. They also determine whether two sets of lines are either parallel or perpendicular and find out whether a given figure contains parallel lines.

Concepts

parallel lines, perpendicular lines, slope formula, slope, slope-intercept form, reciprocals

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Instructional Ideas

• Lead a discussion of point-slope form and how to generate an equation in slope-intercept form using it

Classroom Considerations

• Requires knowledge of finding slope either from a graph or an equation
• Section six in a Parallel and Perpendicular Lines unit with seven parts

• This video is hosted on YouTube

Pros

• Provides an organizational structure to use to take notes
• Includes the steps to the algebra needed to arrive at the solution

Cons

• None

Common Core

SL.9-10.2 SL.11-12.2 MP6 MP7 HSG-GPE.B.5