Question

∆ABC in BC=5.5cm and angle B=75°, angle C=45°

Answer 1

Answer:

BC=5.5

angleB=75°

angle=45°

in ∆ ABC angle sum property

angleA +angleB +angleC= 180°

angleA+75°+45°= 180°

angleA+120°=180°

angleA=180°-120°

angleA=60°

(by angle side angle)