Respuesta :

Left side = 170-58 =121'

Bottom side = 96-4 =92'

Now let's calculate the upper oblique (slantwise) side by Pythagoras

oblique² = 92²+28² = 9248 & oblique =√9248 = 96.167'

The perimeter of the backyards = 96.167+93+92+121 = 402.167 ft