Since the two triangles are congruent. The following must be true: $$\angle A\cong\angle D\\$$ $$\angle B\cong\angle E \\$$ $$\angle C\cong\angle F\\$$ $$\overline{AB}\cong\overline{DE}\\$$ $$\overline{BC}\cong\overline{EF}\\$$ $$\overline{AC}\cong\overline{DF} $$