To find the perimeter your gonna add all the sides
In order to add all the sides the unit of measurement must be the same so we are gonna convert :
5 yards to ft
If 3 ft = 1 yard then multiply 3 by 5 = 15ft
Now that they are the same measurements we can add all the sides.
16 + 15 + 13 *2 = 57 ft
Therefore the perimeter of the isosceles trapezoid is 57ft
