A theorem and a congruence statement are given. What additional information is needed to prove that the triangles are congruent?

By using HL, given \small \overline{CB} \small \cong \small \overline{DF}.



a
\small \angle A \small \cong \small \angle T

b
\small \angle C \small \cong \small \angle D

c
\small \overline{AC} \small \cong \small \overline{EF} or \small \overline{AB} \small \cong \small \overline{ED}

d
\small \overline{AC} \small \cong \small \overline{EF}