Mathematics

Problem

\triangle ABC

AB = 7\,\text{cm}

BC = 9\,\text{cm}

AC = 8\,\text{cm}

\triangle ABC

is congruent to

\triangle PQR

with the correspondence

A \leftrightarrow P,\ B \leftrightarrow Q,\ C \leftrightarrow R

. Given

PQ = 7\,\text{cm}

and

QR = 9\,\text{cm}

, find the length of

PR

. a)

6\,\text{cm}

8\,\text{cm}

9\,\text{cm}

16\,\text{cm}