Question

b = 120° c = 60° d = 30°
b = 60°° c = 30° d = 120°
b = 30° c = 30° d = 120°

Answer 1

Respuesta:

b= 120°     c=60°     d=30°

Explicación paso a paso:

d= 180-90-60=30°

c=a= 60°

b=180-60=120°