You can
put this solution on YOUR website!From the measures that you have given I presume that the polygon is a four sided fig.
Perimeter for any fig, is got by adding all its sides.
Here the top measures 34 m, bottom measures 28m, and both the sides measure 15 m.
Thus perimeter = 34 + 28 + 15 + 15
= 92 m
Good luck!!