https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/v/perpendicular-lines 2021-03-12T17:07:30Z Perpendicular lines from equation Sal determines which pairs out of a few given linear equations are perpendicular. Sal Khan video https://cdn.kastatic.org/googleusercontent/ToK5085KU5PyT8lezB_joGJzsGZShdf7GDME18ZnGWMnFwpsFHun0MHdk46kXEGfsW4_h5XHUXNmPBaC4GqNABm_ Perpendicular lines from equation Sal determines which pairs out of a few given linear equations are perpendicular. https://cdn.kastatic.org/ka-youtube-converted/0671cRNjeKI.mp4/0671cRNjeKI.mp4 209 Perpendicular lines https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-lines/v/classify-lines 2022-09-10T02:03:40.164764806Z Parallel & perpendicular lines from graph The slopes of parallel lines are equal, and the slopes of perpendicular lines are opposite reciprocals. This is a worked example of determining whether given lines are parallel or perpendicular. video https://cdn.kastatic.org/ka_thumbnails_cache/ccf3cc05-28e0-459b-b6d1-521eaf05413c_1280_720_base.png Parallel & perpendicular lines from graph The slopes of parallel lines are equal, and the slopes of perpendicular lines are opposite reciprocals. This is a worked example of determining whether given lines are parallel or perpendicular. https://cdn.kastatic.org/ka-youtube-converted/6riBTnlI4fw.mp4/6riBTnlI4fw.mp4 446 Perpendicular lines https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-lines/e/classifying-lines-as-parallel--perpendicular--or-neither 2026-03-19T10:07:17.424260476Z Parallel & perpendicular lines from graph Given points that two lines go through or the graph of each line, classify the lines as parallel, perpendicular, or neither. . exercise https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/v/perpendicular-lines-2 2021-03-12T17:07:31Z Writing equations of perpendicular lines Given line A and point P, Sal finds the equation of the line perpendicular to A that passes through P. Sal Khan video https://cdn.kastatic.org/googleusercontent/iqgHQBQH8RIda2Dk7Tlk8BGlj7D6QV7z2WlzkC3iej9kQYm0qjH-N4qMQlXVgn4RoQJwj3stj1evZruOswSsGi6i Writing equations of perpendicular lines Given line A and point P, Sal finds the equation of the line perpendicular to A that passes through P. https://cdn.kastatic.org/ka-youtube-converted/TsEhZRT16LU.mp4/TsEhZRT16LU.mp4 181 Perpendicular lines https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/v/find-the-equation-of-a-line 2022-09-10T02:03:40.164764806Z Writing equations of perpendicular lines (example 2) Sal finds the equation of a line perpendicular to a line given in slope-intercept form that passes through a specific point. video https://cdn.kastatic.org/ka_thumbnails_cache/cd30e8e2-1efc-4bf4-8634-a65ae37fbd8d_1280_720_base.png Writing equations of perpendicular lines (example 2) Sal finds the equation of a line perpendicular to a line given in slope-intercept form that passes through a specific point. https://cdn.kastatic.org/ka-youtube-converted/8m8hFcFJ-JM.mp4/8m8hFcFJ-JM.mp4 105 Perpendicular lines