Drawing perpendicular to a line through a point – Using ruler and set-square

Last updated at August 14, 2026 by

Let’s take an example

 

  1. Given a line l
    with point P marked on it
    26.jpg
  2. Put ruler on the line so that line is exactly above the ruler
    Drawing perpendicular to a line through a point – Using ruler and set-square - Part 2

 

3. Place set-square on top of the scale

Drawing perpendicular to a line through a point – Using ruler and set-square - Part 3

 

  1. Move set square so that its edge is at the point P
    Drawing perpendicular to a line through a point – Using ruler and set-square - Part 4
  2. Draw a line along the edge of the set square, keeping set-square firm
    Drawing perpendicular to a line through a point – Using ruler and set-square - Part 5


    So, PQ is the line perpendicular to l


    Drawing perpendicular to a line through a point – Using ruler and set-square - Part 6
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