Need Help ASAP (Show Work) Right answer gets named Brainlestst

Answer:
36
Step-by-step explanation:
b+ 81 = 117 [exterior angle property]
b = 117-81
= 36
I hope im right!!
Answer:
Your answer is 36
Step-by-step explanation:
B+ 81 = 117
b = 117-81
Therefore B= 36