Resposta :
Faça o seguinte raciocínio:
pi rad equivale a 180 graus
pi/4 radianos equivale a 180 / 4 = 45 graus
3 pi /4 radiano equivale a 3 x 45 graus = 135 graus
pi rad equivale a 180 graus
pi/4 radianos equivale a 180 / 4 = 45 graus
3 pi /4 radiano equivale a 3 x 45 graus = 135 graus