prosze na szybko błagam was mam 5 minut

α +α +20°+110°+110°=360° |-20°
α + α +110°+110°=340° |-110°
α + α +110°=230° |-110°
α + α =120°
2 α=120° |:2
α=60°
Sprawdzenie:
60+60+20+110+110=360