The shape described by those vertices is not a square.
The area is 21*31 = 651 square feet.
The area of Bianco is 31 square kilometers.
The area of Zvezdara is 31 square kilometers.
The area of Lumezzane is 31 square kilometers.
The area of Tratalias is 31 square kilometers.
The area of Gambara is 31 square kilometers.
The area of Táliga is 31 square kilometers.
The area of Bádenas is 31 square kilometers.
The area of Letino is 31 square kilometers.
The area of Valsinni is 31 square kilometers.
The area of Lavenone is 31 square kilometers.
The area of Schaffhausen is 31 square kilometers.