Question

determine o valor de x nos triângulos​

Answer 1

a)85+52+y=180

137+y=180

y=43°

x+y=180

x+43=180

x=137°

b)4x+40+x+20+x=180

6x+60=180

6x=120

x=120/6

x=20°

Espero ajudar❤