PLZ HELP I AM GIVING THE CORRECT ANSWER THE BRAINLIEST

Answer:
I don't know the exact answer but I am going to try and help...
Step-by-step explanation:
Okay so as you can see one of the angles is 74 and the other is 40 and SQU SO TRY 74 PLUS 74 PLUS 40???? I don't exactly know i'm just trying to helpppp