Draw a line segment . Draw a perpendicular to at any point on . On this perpendicular choose a point which is away from . Through draw a line parallel to .
STEPS OF CONSTRUCTION:
STEP1:Draw a line segment
STEP2:Take any point on ,at , draw a ray making an angle of .
STEP3:With as center and 4cm as radius draw an arc intersecting at .
STEP4:At draw a line making an angle of with .