So for a hexagon, the sum of all interior angles is 720°, all we need to do is add all the angles up and set it to 720 to get angle B.
[tex] B+133+102+117+90+170=720 [/tex]
Firstly, combine like terms to get [tex] B+612=720 [/tex]
Next, subtract 612 on each side, and your answer should be [tex] B=108 [/tex]
