https://www.khanacademy.org/math/geometry/hs-geo-congruence/hs-geo-bisectors/v/constructing-a-perpendicular-line-using-a-compass-and-straightedge 2021-02-16T16:08:14Z Geometric constructions: perpendicular line through a point on the line Sal constructs a line perpendicular to a given line through a point on the line using compass and straightedge. Sal Khan video https://cdn.kastatic.org/googleusercontent/NgTArIZqt6AglZ5SQuuNIwywyAkEg_zZJqGW0Xai67WihDqRYr00cfCae-2SOniO0jK4s-vt5hZ6O0Zg66frCEsD Geometric constructions: perpendicular line through a point on the line Sal constructs a line perpendicular to a given line through a point on the line using compass and straightedge. https://cdn.kastatic.org/ka-youtube-converted/nM-O8llUdwg.mp4/nM-O8llUdwg.mp4 72 Perpendicular to a line at a point on the line