To construct: Δ ABC where m∠ A = 60° , m∠B = 30° and AB = 5.8 cm.
Steps of construction:
(a) Draw a line segment AB = 5.8 cm.
(b) At point A, draw an angle ∠ YAB = 60° with the help of compass.
(c) At point B, draw ∠ XBA = 30° with the help of compass.
(d) AY and BX intersect at the point C.
It is the required triangle ABC.