Mathematics

Problem

\triangle DEF

, points

G

DE

and

H

DF

are such that

GH \parallel EF

. If

DG = 4\,\text{cm}

GE = 6\,\text{cm}

and

DH = 5\,\text{cm}

, find

HF

. a)

12.5\,\text{cm}

6\,\text{cm}

7.5\,\text{cm}

8\,\text{cm}