Чему равен угол между лучом и поверхностью, если угол между и отраженным лучами равен 80 градусов?
MaksandSany
2
24.11.2019 21:27
2 
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2
50°
Объяснение:
Угол между перпендикуляром и лучом 80/2=40°
Угол между лучом и поверхностью
90-40 =50°