Mathematics

Problem

\triangle ABC \cong \triangle DEF

with correspondence

AB \leftrightarrow DE

BC \leftrightarrow EF

and

CA \leftrightarrow FD

. Also,

\triangle DEF \cong \triangle PQR

with correspondence

DE \leftrightarrow PR

EF \leftrightarrow PQ

and

FD \leftrightarrow QR

. If

\angle BAC = 42^{\circ}

, what is the measure of

\angle QRP

? a)

60^{\circ}

84^{\circ}

48^{\circ}

42^{\circ}