I really need help I don’t understand this and it’s a quiz

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