∵△次A次B次C∽于△ABC
∴次A次B/AB=次A次C/AC
即 次A次B/4=3.3/3
∴次A次B=4*3.3/3=4.4(cm)
∴∠次A=∠A=180°-∠B -∠C=180°-48°-92°=40°