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2x+y=180
y= x-33
2x+x-33=180
3x=213
x=71
katy przy podstawie = 71
kat miedzy ramionami= 71-33=38
x - kąt przy podstawie
2x + ( x - 33° ) = 180°
2x + x - 33° = 180°
3x = 180° - 33°
3x = 147° | : 3
x = 49°
kąt miedzy ramionami:
49° + 33° = 82°