Question

1 Draw line. /. Take any point pon the line using a set square,
draw line perpendicular to line at the point p.​

Answer 1

1. draw line l.take point P anywhere on the line
2. place the set square on the line in such way that the vertex of its right angle fall on the line L
3. Draw the line PQ along of the set square
4. the line PQ is perpendicular to line L and P

I hope it's useful for you