Draw an angle and label it as ∠BAC. Construct another angle, equal to ∠BAC.
Steps of construction :
(i) Draw an angle BAC.
(ii) Draw a line DF.
(iii) With centre A and D, draw arcs of equal radius which intersect AC at L and AB at M and DF at P.
(iv) Cut off PQ = LM and join DQ produce it to E, then ∠EDF=∠BAC.