Draw a line l. Take a point A outside the line. Through point A draw a line parallel to line l.
Steps of construction : (1) Draw a line l. Take a point A outside the line l. (2) Draw a segment AM ⊥ line l. (3) Take another point N on line l. (4) Draw a segment NB ⊥ line l, such that l(NB) = l(MA). (5) Draw a line m passing through the points A and B. Hence, the line m is the required line that passes through point A and parallel to line l.