Mathematics

Problem

\triangle ABC

, a line through

D

AB

and

E

AC

is parallel to

BC

. If

AD=3\,\text{cm}

DB=5\,\text{cm}

and

AC=12\,\text{cm}

, find

AE

. a)

7.5\,\text{cm}

9\,\text{cm}

4.5\,\text{cm}

3\,\text{cm}