13. Show that the lines x-5/7 = y+2/5 = z/1 and x/1 = y/2 = z/3 are perpendicular to each other. 13. Show that the lines x-5/7 = y+2/5 = z/1 and x/1 = y/2 = z/3 are perpendicular to each other. November 15, 2021 Category: Chapter 11 - 3D Geometry , Maths , NCERT [...]