103. а) 360° - (45°+105°+120°) = 90°
б) 360° - (30°+80°+140°) = 110°
в) 360° - (93°+160°+77°) = 30°
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103. а) 360° - (45°+105°+120°) = 90°
б) 360° - (30°+80°+140°) = 110°
в) 360° - (93°+160°+77°) = 30°