Răspuns :
∡B = 150° => ∡A = 180° - 150° = 30° (suplementare)
duc DE ⊥ AB
In ΔABC dreptunghic conform T30° => DE = AD/2 = 16/2 = 8 cm
∡B = 150° => ∡A = 180° - 150° = 30° (suplementare)
duc DE ⊥ AB
In ΔABC dreptunghic conform T30° => DE = AD/2 = 16/2 = 8 cm