Mathematics

Problem

\triangle DEF

G

is a point on

DE

and

H

is a point on

DF

such that

GH \parallel EF

. If

DG = 3\dfrac{1}{2}\,\text{cm}

GE = 2\,\text{cm}

and

DH = 5\,\text{cm}

, find the length of

HF