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P. 2
Step 3: With A and B as centres and a radius greater than AP construct two arcs, which cut
each other at Q.
Step 4: Join PQ. Then PQ is perpendicular to l l.
3) Perpendicular to a line through a point not on it
Method-1: By using ruler and a set-square
Step 1: Let l be the given line and P be a point outside l.
Step 2: Place a set-square on l such that one arm of its right angle aligns along l.
Step 3: Place a ruler along the edge opposite to the right angle of the set-square.
