You don't say if the supports start and end at the edges of the side, but if they do, the side is 28 feet long.
32
200 feet
There are seven tarsal bones are in each ankle and eight carpal bones in each of your wrists.
496 sq. ft.
Their feet and legs, as there are eight each of them!
90 feet
Six feet
60 feet.
Giraffes never get eight feet. Octopusses are born with eight feet but giraffes? don't be silly! Giraffes never get eight feet. Octopusses are born with eight feet but giraffes? don't be silly!
Oversimplifying in the usual textbook manner: The octagonal pier has eight faces, each 1 ft by 10 ft or 10 square feet. Eight faces, each 10 square feet, requires 80 square feet.
stirrups
10 feet