if its one of the options and you have the same diagram as me the answer would be 150 the circle adds up to 360 in total so if angle 1 is 100 then angle 2 has to be 80 because a line adds up to 180 since the angle 3 is 30 you just add up 180 and 30 which would be 210 you just subtract that from 360 and you are left with 150
(again only if you have the same diagram as me because i had the same question but with 150 instead or 110)
