Mathematics

Problem

\triangle ABC

is right-angled at

B

with

AC = 13\,\text{cm}

and

AB = 5\,\text{cm}

\triangle PQR

is right-angled at

Q

with

PR = 13\,\text{cm}

and

PQ = 5\,\text{cm}

. If the two triangles are congruent, what is the length of

QR

? a) 10 cm b) 12 cm c) 11 cm d) 8 cm