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2=2/5*90=18
3=90-18=72
Drugi kąt - 2/5 x 90* = 36*
Trzeci kąt - 180*-(90*+36*)=54*
2/5= 40%
2kąt= 40% z 90°= 36°
3 kąt=180°-(90°+36°)=54°
odp. kąty ostre mają 36° i 54°
pozdr