105°
150°
Х°
180°-105°=75°
180°-150=30°
180°-(75°+30°)=180°-105°=75°
Ответ: х=75°
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105°
150°
Х°
180°-105°=75°
180°-150=30°
180°-(75°+30°)=180°-105°=75°
Ответ: х=75°