Mathematics

Problem

\triangle PQR

PQ = 10\,\text{cm}

QR = 12\,\text{cm}

and

PR = 14\,\text{cm}

. Points

S

and

T

are the midpoints of

PQ

and

PR

respectively. What is the length of

ST

? a) 12\,\text{cm} b) 6\,\text{cm} c) 7\,\text{cm} d) 11\,\text{cm}