Odpowiedź:
a)
[tex]\alpha = 180 - 50 = 130 \\\beta = \alpha \\\beta = 130[/tex]
b)
[tex]\beta = 135\\\alpha = 180 - \beta \\\alpha = 180 - 135 = 45[/tex]
c)
[tex]\beta = 40\\\alpha = 180 - 50 - 40\\\alpha = 90[/tex]
