Khan Academy Static

Learn all about equations of parallel and perpendicular

7440_Proof_perpendicular_lines_have_negative_reciprocal_slope.html

7439_Proof_parallel_lines_have_the_same_slope.html

7434_Parallel_lines_from_equation_example_2_.html

7436_Perpendicular_lines_from_equation.html

7437_Writing_equations_of_perpendicular_lines.html

7433_Parallel_lines_from_equation.html

7435_Parallel_lines_from_equation_example_3_.html

7438_Writing_equations_of_perpendicular_lines_example_2_.html

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