BC = 4.2cm, ∠ABC = 60˚ and AB = 5 cm
Steps of construction :
(i) Draw BC of length 4.2 cm
(ii) Draw an angle of 60˚ at B.
(iii) Cut BA = 5 cm and join A to B.
(iv) Draw angle bisector of ∠ABC.
(v) Draw BD at 2 cm intersecting EF at O.
(vi) Taking O as centre and 2 cm as radius draw the required circle.