Draw any . Through , draw a line parallel to .
STEPS OF CONSTRUCTION:
STEP 1:Draw a .
STEP 2:At Q draw an arc with any radius to intersect at and at .
STEP 3:With the same radius draw an arc at opposite to the arc which intersects at .
STEP 4:Now measure the arc .
STEP 5:With the same measure draw an arc intersecting the previous arc at .
STEP 6:By joining to we get a line which is parallel to .
Hence is the required line.