Question

Pi /2 rad
Pi/5/4rad
Pi/4/3 Rad

Answer 1

1.π/2 rad=π/2*180/π=2*180=360°;;
2.π/5/4rad=π/5*1/4*180/π=180/20=6°
3.π/4/3rad=π*/4*1/3*180/π=180/12=15°;;
nota: Houve simplificação de Pi(π).