Draw a ΔABC in which BC = 5 cm, AB = 4 cm and m∠B = 50°.

Steps of construction:

(i) Draw QR = 5.4 cm.

(ii) Draw ∠Q = 40°.

(iii) Take R as the centre and with radius 6.2 cm, draw an arc to meet the former angle line at P.

(iv) Join PR.

(v) ΔPQR is the required triangle.