I think 121
406 + 94 = 500 and 180 + 199 = 379.
Subtract that and 121 is what’s left.
I’m not gonna answer the entire thing for you but I’ll give you a Headstart. In problems like Number nine you take where the Second leg is an subtracted by the first leg giving you the degree measure. And problems like 18 through 21 you have to find angle measures with the same markings
