tolong bantuin ya besok dikumpul soalny

360-246= 114°
180 = 114+3a+12
3a = 180-126
a= 54:3 = 18°


3a+12 = 3.18+12 = 66°
180=66+4b
4b=180-66
b = 114:4 = 28,5°


good luck.. be a the best... ;-)