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How can you use the equations of two non-vertical lines to tell wether the lines are parallel or perpendicular?

In: Math and Arithmetic, Geometry [Edit categories]

Answer:

-- Rearrange the equation of Line #1 into the form y₁ = A₁x₁ + B₁

-- Rearrange the equation of Line #2 into the form y₂ = A₂x₂ + B₂

-- Compare the constants A₁ and A₂.

If A₁ = A₂, then the lines are parallel.

If A₁ = -1/A₂, then the lines are perpendicular.

First answer by Alcohen2006. Last edit by Alcohen2006. Contributor trust: 1139 [recommend contributor ]. Question popularity: 0 [recommend question].

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