A-ha, a very easy Geometry topic, corresponding angles.
QP --> ED
PR --> DF
RQ --> FE
Q = E
P = D
R = F
The reasoning behind all of these are considered corresponding is because of CPCTC. Corresponding Parts of Congruent Triangles are Congruent. Since both Triangle PQR and DEF are congruent, it is safe to assume all of these are the answers.