PLEASE HELP ME! find the measure of each numbered angle. pls

Answer: ∠1 = 37.5°; ∠2 = 37.5°; ∠3 = 133°.
Step-by-step explanation:
∠1 = ∠2 = (180° - 105°) ÷ 2 = 37.5°
∠3 = 180° - 23° - 24° = 133°