
$FGH$ is a right angled triangle with shortest sides $FH = 6\text{cm}$ and $FG = 8\text{cm}$.
$I$, $J$, and $K$ are the mid points of the sides $GH$, $FH$ and $FG$ respectively.
What is the perimeter of the triangle $IJK$?
If you liked this problem,
here is an NRICH task that challenges you to use similar mathematical ideas.