https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/a/analytic-geometry-faq 2026-04-07T17:44:52.822958724Z Analytic geometry FAQ Frequently asked questions about analytic geometry article https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/v/parallel-lines 2022-10-07T00:00:24.225559754Z Parallel lines from equation Sal determines which pairs out of a few given linear equations are parallel. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/94784bb9-4e26-49c9-ae3b-e807b8a34c01_1280_720_base.png Parallel lines from equation Sal determines which pairs out of a few given linear equations are parallel. https://cdn.kastatic.org/ka-youtube-converted/T-aCweuimis.mp4/T-aCweuimis.mp4 228 Parallel lines https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/v/parallel-lines-2 2022-10-07T00:00:24.225559754Z Parallel lines from equation (example 2) Sal determines which pairs out of a few given linear equations are parallel. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/42e58ef9-ca94-4d27-b084-497bc330663a_1280_720_base.png Parallel lines from equation (example 2) Sal determines which pairs out of a few given linear equations are parallel. https://cdn.kastatic.org/ka-youtube-converted/lOWXZFP8Vuc.mp4/lOWXZFP8Vuc.mp4 183 Parallel lines https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/v/parallel-lines-3 2021-03-12T17:07:31Z Parallel lines from equation (example 3) Sal determines which pairs out of a few given linear equations are parallel. Sal Khan video https://cdn.kastatic.org/googleusercontent/wBD4KiCH8IKJzQuL8qfyxfgxB4b6G0gMdIh01tD-LP0QR2sIs9KG_MS1W-33x6KS7uu-LV7Kjs-yOxyvF4AlDcsc Parallel lines from equation (example 3) Sal determines which pairs out of a few given linear equations are parallel. https://cdn.kastatic.org/ka-youtube-converted/y5yNi08cr6I.mp4/y5yNi08cr6I.mp4 162 Parallel lines https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/e/line_relationships 2026-04-01T19:14:44.29143589Z Parallel & perpendicular lines from equation Use the equations of a pair of lines to decide whether they intersect or not. If yes, are they perpendicular? If no, are they distinct or the same line? Scott Menke exercise https://www.khanacademy.org/math/geometry/hs-geo-analytic-geometry/hs-geo-parallel-perpendicular-eq/e/writing-equations-for-parallel-or-perpendicular-lines 2026-03-19T10:07:17.424260476Z Write equations of parallel & perpendicular lines Write the equation for a line that is a parallel or perpendicular to a line given in slope-intercept form and goes through a specific point. . exercise