216 inches
18feet = 6yards 0inches
36 square yards
Yes you can.
18feet by 17feet converts to 306 feet square or 28.4 meters square.
18 feet is 6 yards @three feet per yard.
9 feet.
There are 3 feet in one yard so 18feet/(3feet/yard) 6 yards
It depends on what type of dolphin but dolphins can get anywhere from 3-18feet
If that is a rectangle you are talking about, multiply length x width.
18 feet x13 feet is ~21.7 square meters.
6ft 10in
Sq footage = 18*25 = 450 square feet.