Tolong bantu darurat

CA-> = BAC = ACB = 180 - 120 = 60
2x + 60 + 60 = 180
2x = 180 - 60 - 60
2x = 60
x = 60 : 2
x = 30

g//k
AB = BC
< ACS = 120°


< gAB + < ACS = 180°
2x + 120° = 180°
2x = 180° - 120°
2x = 60°
x = 60°/2
x = 30° (a)