SAT Lines, angles, and triangles Question

In triangle DEF, the measure of angle D is $40^{\circ }$ and the measure of angle E is $95^{\circ }$ . In triangle RST, the measure of angle R is $40^{\circ }$ and the measure of angle S is $95^{\circ }$ . Which of the following additional pieces of information is needed to determine whether triangle DEF is similar to triangle RST?