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II kąt - 180-x
x+0,5*x = 180-x-0,5*x
x+0,5x = 180-x-0,5x
1,5x = 180-1,5x
1,5x+1,5x = 180
3x = 180 |:3
x = 60
I kąt - 60 stopni
II kąt - 180-60 = 120 stopni