Answer:
Rounded: he should by 170 feet fencing.
Explanation:
This is just a Pythagorean Theorem question
L = 120 yards
W = 120 yards
c = ??
a^2 + b^2 = c^2
120^2 + 120^2 = c^2
c^2 = 14400 + 14400
c^2 = 28800 Take the square root of both sides.
sqrt(c^2)=sqrt(28800)
c = 169.7