itu gimana ya tolong dijawab yaaa

A) 2x + 142 + 28 = 360°
2x = 360° — (142 + 28)°
2x = 190°
x = 95°
B) 120 + 3x + 30 + 90 = 360°
3x + 240° = 360°
3x = 120°
x = 40°
C) 2x + 10 + 110 = 180°
(karena berpelurus)
2x = 180° — 120°
2x = 60°
x = 30°
Jadikan jawaban terbaik & Follow aku yaa :) semoga membantu :)