Răspuns:
(EDF) + (EF) = 360°
(EDF) = 5(EF)
inlocuim (EDF)
5(EF) + (EF) = 360°
6(EF) = 360°
(EF) = 360° : 6
(EF) = 60°
(EDF) = 300°
(EDF) + (EF) = 360°
(EDF) = 4(EF)
inlocuim (EDF)
4(EF) + (EF) = 360°
5(EF) = 360°
(EF) = 360° : 5
(EF) = 72°
(EDF) = 360°-72°
(EDF) = 288°