The answer is 77. if you do it the opposite way and multiply
It is a ratio problem...
2 dogs need 144 feet = 2 : 144
Simplify the ratio = 1 : 72
Multiply both sides by 8 (8 dogs) = 1*8 :144*8
Simplify the ratio = 8 : 1152
8 dogs need 1152 feet of fencing
Hope this helps!
It's a hexagon it has 6 sides
V (7,9) would make PRTV a square
