how-do-you-determine-if-the-lines-are-perpendicular

# Interactive video lesson plan for: How do you determine if the lines are perpendicular?

#### Activity overview:

http://www.moomoomath.com/Perpendicular.html
Given points, how do you determine if the lines created from ordered pairs are penpendicular or not.
Review: Lines are perpendicular if the slopes are negative reciprocals or multiply to -1
Step 1. Use the slope equation to calculate the slope from the ordered pairs.
Step 2. Look at the slope from each line and see if they are a negative reciprocal or if you multiply the two slopes together it equals -1

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Tagged under: Perpendicular,slope line,negative reciprocal,slope formula,ordered pairs, lines perpendicular

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