Answer:C - 55
Step-by-step explanation:
Beacuse à triangle is equal to 180 and so you add 40 and 30 then you subtract that with 180 and divided it by two since y is the same number.
Hope this helped :) I tried my best to explain it
Answer:C
y + y+ 30 + 40 = 180 the three angles added together = 180
2y + 70 = 180 subtract 70 from both sides
2y = 110 divide by 2 on both sides
y =55
