Question

sabendo que r//s//t calcule x e y

Answer 1

a = 120 graus

b + 120 = 180
b = 180 - 120 ==> b = 60 graus

e + 130 = 180
e = 180 - 130 ==> e = 50 graus

d = e ==> d = 50 graus

b + c + d = 180
60 + c + 50 = 180
c + 110 = 180
c = 180 - 110
c = 70 graus