∠AOB = 120°
∠AOC = 150°
Всё через смежные углы:
∠A1OC = 150° (180°-30°)
∠BOC = 30° (180°-150°)
∠AOB = 120° (180°-(30°+30°))
∠AOC = 150 (180°-30°)
∠AOB = 120°
∠AOC = 150°
Всё через смежные углы:
∠A1OC = 150° (180°-30°)
∠BOC = 30° (180°-150°)
∠AOB = 120° (180°-(30°+30°))
∠AOC = 150 (180°-30°)