Answer:
114°
Step-by-step explanation:
to understand this
you need to know about:
tips and formulas:
- a straight line contains 180°
let's solve:
[tex] step - 1 : define[/tex]
[tex]b + 66 = 180[/tex]
[tex]step - 2 : solve[/tex]
- cancel 66 from both sides:b+66-66=180-66
- therefore b=114
